Security Errata

This section will be dedicated to security errata.  Users will be able to find out information regarding security issues and when a fix or work around is available. We will also provide severity levels so that users have an idea on severity.  Best practices are to update when your upgrade notifier tells you.

 The comments are open for people to offer input as well as post any Security errata and issues they feel need to be addressed.

10 comments:

  1. ==========================================================================
    Ubuntu Security Notice USN-2907-2
    February 22, 2016

    linux-lts-trusty vulnerabilities
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Ubuntu 12.04 LTS

    Summary:

    Several security issues were fixed in the kernel.

    Software Description:
    - linux-lts-trusty: Linux hardware enablement kernel from Trusty

    Details:

    halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,
    incorrectly propagated file attributes, including setuid. A local
    unprivileged attacker could use this to gain privileges. (CVE-2016-1576)

    halfdog discovered that OverlayFS in the Linux kernel incorrectly
    propagated security sensitive extended attributes, such as
    POSIX ACLs. A local unprivileged attacker could use this to gain
    privileges. (CVE-2016-1575)

    It was discovered that the Linux kernel keyring subsystem contained a race
    between read and revoke operations. A local attacker could use this to
    cause a denial of service (system crash). (CVE-2015-7550)

    郭永刚 discovered that the Linux kernel networking implementation did
    not validate protocol identifiers for certain protocol families, A local
    attacker could use this to cause a denial of service (system crash) or
    possibly gain administrative privileges. (CVE-2015-8543)

    Dmitry Vyukov discovered that the pptp implementation in the Linux kernel
    did not verify an address length when setting up a socket. A local attacker
    could use this to craft an application that exposed sensitive information
    from kernel memory. (CVE-2015-8569)

    David Miller discovered that the Bluetooth implementation in the Linux
    kernel did not properly validate the socket address length for Synchronous
    Connection-Oriented (SCO) sockets. A local attacker could use this to
    expose sensitive information. (CVE-2015-8575)

    It was discovered that the Linux kernel's Filesystem in Userspace (FUSE)
    implementation did not handle initial zero length segments properly. A
    local attacker could use this to cause a denial of service (unkillable
    task). (CVE-2015-8785)

    Update instructions:

    The problem can be corrected by updating your system to the following
    package versions:

    Ubuntu 12.04 LTS:
    linux-image-3.13.0-79-generic 3.13.0-79.123~precise1
    linux-image-3.13.0-79-generic-lpae 3.13.0-79.123~precise1

    After a standard system update you need to reboot your computer to make
    all the necessary changes.

    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed.
    Unless you manually uninstalled the standard kernel metapackages
    (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
    linux-powerpc), a standard system upgrade will automatically perform
    this as well.

    References:
    http://www.ubuntu.com/usn/usn-2907-2
    http://www.ubuntu.com/usn/usn-2907-1
    CVE-2015-7550, CVE-2015-8543, CVE-2015-8569, CVE-2015-8575,
    CVE-2015-8785, CVE-2016-1575, CVE-2016-1576

    ReplyDelete
  2. ==========================================================================
    Ubuntu Security Notice USN-2908-1
    February 22, 2016

    linux vulnerabilities
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Ubuntu 15.10

    Summary:

    Several security issues were fixed in the kernel.

    Software Description:
    - linux: Linux kernel

    Details:

    halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,
    incorrectly propagated file attributes, including setuid. A local
    unprivileged attacker could use this to gain privileges. (CVE-2016-1576)

    halfdog discovered that OverlayFS in the Linux kernel incorrectly
    propagated security sensitive extended attributes, such as POSIX ACLs. A
    local unprivileged attacker could use this to gain privileges.
    (CVE-2016-1575)

    It was discovered that the Linux kernel did not properly enforce rlimits
    for file descriptors sent over UNIX domain sockets. A local attacker could
    use this to cause a denial of service. (CVE-2013-4312)

    It was discovered that the Linux kernel's Filesystem in Userspace (FUSE)
    implementation did not handle initial zero length segments properly. A
    local attacker could use this to cause a denial of service (unkillable
    task). (CVE-2015-8785)

    Andy Lutomirski discovered a race condition in the Linux kernel's
    translation lookaside buffer (TLB) handling of flush events. A local
    attacker could use this to cause a denial of service or possibly leak
    sensitive information. (CVE-2016-2069)

    Update instructions:

    The problem can be corrected by updating your system to the following
    package versions:

    Ubuntu 15.10:
    linux-image-4.2.0-30-generic 4.2.0-30.35
    linux-image-4.2.0-30-generic-lpae 4.2.0-30.35
    linux-image-4.2.0-30-lowlatency 4.2.0-30.35
    linux-image-4.2.0-30-powerpc-e500mc 4.2.0-30.35
    linux-image-4.2.0-30-powerpc-smp 4.2.0-30.35
    linux-image-4.2.0-30-powerpc64-emb 4.2.0-30.35
    linux-image-4.2.0-30-powerpc64-smp 4.2.0-30.35

    After a standard system update you need to reboot your computer to make
    all the necessary changes.

    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed.
    Unless you manually uninstalled the standard kernel metapackages
    (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
    linux-powerpc), a standard system upgrade will automatically perform
    this as well.

    References:
    http://www.ubuntu.com/usn/usn-2908-1
    CVE-2013-4312, CVE-2015-8785, CVE-2016-1575, CVE-2016-1576,
    CVE-2016-2069

    ReplyDelete
  3. ==========================================================================
    Ubuntu Security Notice USN-2908-2
    February 22, 2016

    linux-lts-wily vulnerabilities
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Ubuntu 14.04 LTS

    Summary:

    Several security issues were fixed in the kernel.

    Software Description:
    - linux-lts-wily: Linux hardware enablement kernel from Wily

    Details:

    halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,
    incorrectly propagated file attributes, including setuid. A local
    unprivileged attacker could use this to gain privileges. (CVE-2016-1576)

    halfdog discovered that OverlayFS in the Linux kernel incorrectly
    propagated security sensitive extended attributes, such as POSIX ACLs. A
    local unprivileged attacker could use this to gain privileges.
    (CVE-2016-1575)

    It was discovered that the Linux kernel did not properly enforce rlimits
    for file descriptors sent over UNIX domain sockets. A local attacker could
    use this to cause a denial of service. (CVE-2013-4312)

    It was discovered that the Linux kernel's Filesystem in Userspace (FUSE)
    implementation did not handle initial zero length segments properly. A
    local attacker could use this to cause a denial of service (unkillable
    task). (CVE-2015-8785)

    Andy Lutomirski discovered a race condition in the Linux kernel's
    translation lookaside buffer (TLB) handling of flush events. A local
    attacker could use this to cause a denial of service or possibly leak
    sensitive information. (CVE-2016-2069)

    Update instructions:

    The problem can be corrected by updating your system to the following
    package versions:

    Ubuntu 14.04 LTS:
    linux-image-4.2.0-30-generic 4.2.0-30.35~14.04.1
    linux-image-4.2.0-30-generic-lpae 4.2.0-30.35~14.04.1
    linux-image-4.2.0-30-lowlatency 4.2.0-30.35~14.04.1
    linux-image-4.2.0-30-powerpc-e500mc 4.2.0-30.35~14.04.1
    linux-image-4.2.0-30-powerpc-smp 4.2.0-30.35~14.04.1
    linux-image-4.2.0-30-powerpc64-emb 4.2.0-30.35~14.04.1
    linux-image-4.2.0-30-powerpc64-smp 4.2.0-30.35~14.04.1

    After a standard system update you need to reboot your computer to make
    all the necessary changes.

    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed.
    Unless you manually uninstalled the standard kernel metapackages
    (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
    linux-powerpc), a standard system upgrade will automatically perform
    this as well.

    References:
    http://www.ubuntu.com/usn/usn-2908-2
    http://www.ubuntu.com/usn/usn-2908-1
    CVE-2013-4312, CVE-2015-8785, CVE-2016-1575, CVE-2016-1576,
    CVE-2016-2069

    ReplyDelete
  4. ==========================================================================
    Ubuntu Security Notice USN-2910-1
    February 22, 2016

    linux-lts-vivid vulnerabilities
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Ubuntu 14.04 LTS

    Summary:

    Several security issues were fixed in the kernel.

    Software Description:
    - linux-lts-vivid: Linux hardware enablement kernel from Vivid

    Details:

    halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,
    incorrectly propagated file attributes, including setuid. A local
    unprivileged attacker could use this to gain privileges. (CVE-2016-1576)

    halfdog discovered that OverlayFS in the Linux kernel incorrectly
    propagated security sensitive extended attributes, such as POSIX ACLs. A
    local unprivileged attacker could use this to gain privileges.
    (CVE-2016-1575)

    It was discovered that the Linux kernel keyring subsystem contained a race
    between read and revoke operations. A local attacker could use this to
    cause a denial of service (system crash). (CVE-2015-7550)

    郭永刚 discovered that the Linux kernel networking implementation did
    not validate protocol identifiers for certain protocol families, A local
    attacker could use this to cause a denial of service (system crash) or
    possibly gain administrative privileges. (CVE-2015-8543)

    Dmitry Vyukov discovered that the pptp implementation in the Linux kernel
    did not verify an address length when setting up a socket. A local attacker
    could use this to craft an application that exposed sensitive information
    from kernel memory. (CVE-2015-8569)

    David Miller discovered that the Bluetooth implementation in the Linux
    kernel did not properly validate the socket address length for Synchronous
    Connection-Oriented (SCO) sockets. A local attacker could use this to
    expose sensitive information. (CVE-2015-8575)

    It was discovered that the Linux kernel's Filesystem in Userspace (FUSE)
    implementation did not handle initial zero length segments properly. A
    local attacker could use this to cause a denial of service (unkillable
    task). (CVE-2015-8785)

    Update instructions:

    The problem can be corrected by updating your system to the following
    package versions:

    Ubuntu 14.04 LTS:
    linux-image-3.19.0-51-generic 3.19.0-51.57~14.04.1
    linux-image-3.19.0-51-generic-lpae 3.19.0-51.57~14.04.1
    linux-image-3.19.0-51-lowlatency 3.19.0-51.57~14.04.1
    linux-image-3.19.0-51-powerpc-e500mc 3.19.0-51.57~14.04.1
    linux-image-3.19.0-51-powerpc-smp 3.19.0-51.57~14.04.1
    linux-image-3.19.0-51-powerpc64-emb 3.19.0-51.57~14.04.1
    linux-image-3.19.0-51-powerpc64-smp 3.19.0-51.57~14.04.1

    After a standard system update you need to reboot your computer to make
    all the necessary changes.

    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed.
    Unless you manually uninstalled the standard kernel metapackages
    (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
    linux-powerpc), a standard system upgrade will automatically perform
    this as well.

    References:
    http://www.ubuntu.com/usn/usn-2910-1
    CVE-2015-7550, CVE-2015-8543, CVE-2015-8569, CVE-2015-8575,
    CVE-2015-8785, CVE-2016-1575, CVE-2016-1576

    ReplyDelete
  5. ==========================================================================
    Ubuntu Security Notice USN-2911-1
    February 22, 2016

    linux vulnerability
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Ubuntu 12.04 LTS

    Summary:

    The system could be made to crash under certain conditions.

    Software Description:
    - linux: Linux kernel

    Details:

    It was discovered that the Linux kernel keyring subsystem contained a race
    between read and revoke operations. A local attacker could use this to
    cause a denial of service (system crash).

    Update instructions:

    The problem can be corrected by updating your system to the following
    package versions:

    Ubuntu 12.04 LTS:
    linux-image-3.2.0-99-generic 3.2.0-99.139
    linux-image-3.2.0-99-generic-pae 3.2.0-99.139
    linux-image-3.2.0-99-highbank 3.2.0-99.139
    linux-image-3.2.0-99-omap 3.2.0-99.139
    linux-image-3.2.0-99-powerpc-smp 3.2.0-99.139
    linux-image-3.2.0-99-powerpc64-smp 3.2.0-99.139
    linux-image-3.2.0-99-virtual 3.2.0-99.139

    After a standard system update you need to reboot your computer to make
    all the necessary changes.

    ATTENTION: Due to an unavoidable ABI change the kernel updates have
    been given a new version number, which requires you to recompile and
    reinstall all third party kernel modules you might have installed.
    Unless you manually uninstalled the standard kernel metapackages
    (e.g. linux-generic, linux-generic-lts-RELEASE, linux-virtual,
    linux-powerpc), a standard system upgrade will automatically perform
    this as well.

    References:
    http://www.ubuntu.com/usn/usn-2911-1
    CVE-2015-7550

    ReplyDelete
  6. ==========================================================================
    Ubuntu Security Notice USN-2913-1
    February 24, 2016

    ca-certificates update
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Ubuntu 15.10
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS
    - Black Lab Linux 5.x/6.x/7.x

    Summary:

    ca-certificates was updated to the 20160104 package.

    Software Description:
    - ca-certificates: Common CA certificates

    Details:

    The ca-certificates package contained outdated CA certificates. This update
    refreshes the included certificates to those contained in the 20160104
    package, including the removal of the SPI CA and CA certificates with
    1024-bit RSA keys.

    Update instructions:

    The problem can be corrected by updating your system to the following
    package versions:

    Ubuntu 15.10:
    ca-certificates 20160104ubuntu0.15.10.1

    Ubuntu 14.04 LTS:
    ca-certificates 20160104ubuntu0.14.04.1

    Ubuntu 12.04 LTS:
    ca-certificates 20160104ubuntu0.12.04.1

    In general, a standard system update will make all the necessary changes.

    References:
    http://www.ubuntu.com/usn/usn-2913-1
    https://launchpad.net/bugs/1528645

    Package Information:
    https://launchpad.net/ubuntu/+source/ca-certificates/20160104ubuntu0.15.10.1
    https://launchpad.net/ubuntu/+source/ca-certificates/20160104ubuntu0.14.04.1
    https://launchpad.net/ubuntu/+source/ca-certificates/20160104ubuntu0.12.04.1

    ReplyDelete
  7. ==========================================================================
    Ubuntu Security Notice USN-2903-2
    February 23, 2016

    nss regression
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Ubuntu 12.04 LTS
    - Black Lab Linux 4.x

    Summary:

    USN-2903-1 introduced a regression in NSS.

    Software Description:
    - nss: Network Security Service library

    Details:

    USN-2903-1 fixed a vulnerability in NSS. An incorrect package versioning
    change in Ubuntu 12.04 LTS caused a regression when building software
    against NSS. This update fixes the problem.

    We apologize for the inconvenience.

    Original advisory details:

    Hanno Böck discovered that NSS incorrectly handled certain division
    functions, possibly leading to cryptographic weaknesses. (CVE-2016-1938)
    This update also refreshes the NSS package to version 3.21 which includes
    the latest CA certificate bundle, and removes the SPI CA.

    Update instructions:

    The problem can be corrected by updating your system to the following
    package versions:

    Ubuntu 12.04 LTS:
    libnss3-dev 2:3.21-0ubuntu0.12.04.2

    In general, a standard system update will make all the necessary changes.

    References:
    http://www.ubuntu.com/usn/usn-2903-2
    http://www.ubuntu.com/usn/usn-2903-1
    https://launchpad.net/bugs/1547147

    Package Information:
    https://launchpad.net/ubuntu/+source/nss/2:3.21-0ubuntu0.12.04.2

    ReplyDelete
  8. ==========================================================================
    Ubuntu Security Notice USN-2908-4
    February 26, 2016

    linux regression
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Black Lab Linux 7.0.3
    - Ubuntu 15.10

    Summary:

    USN-2908-1 introduced a regression in the Linux kernel.

    Software Description:
    - linux: Linux kernel

    Details:

    USN-2908-1 fixed vulnerabilities in the Linux kernel for Ubuntu
    15.10. An incorrect locking fix caused a regression that broke
    graphics displays for Ubuntu 15.10 guests running within VMWare
    virtual machines. This update fixes the problem.

    We apologize for the inconvenience.

    Original advisory details:

    halfdog discovered that OverlayFS, when mounting on top of a FUSE mount,
    incorrectly propagated file attributes, including setuid. A local
    unprivileged attacker could use this to gain privileges. (CVE-2016-1576)

    halfdog discovered that OverlayFS in the Linux kernel incorrectly
    propagated security sensitive extended attributes, such as POSIX ACLs. A
    local unprivileged attacker could use this to gain privileges.
    (CVE-2016-1575)

    It was discovered that the Linux kernel did not properly enforce rlimits
    for file descriptors sent over UNIX domain sockets. A local attacker could
    use this to cause a denial of service. (CVE-2013-4312)

    It was discovered that the Linux kernel's Filesystem in Userspace (FUSE)
    implementation did not handle initial zero length segments properly. A
    local attacker could use this to cause a denial of service (unkillable
    task). (CVE-2015-8785)

    Andy Lutomirski discovered a race condition in the Linux kernel's
    translation lookaside buffer (TLB) handling of flush events. A local
    attacker could use this to cause a denial of service or possibly leak
    sensitive information. (CVE-2016-2069)

    Update instructions:

    The problem can be corrected by updating your system to the following
    package versions:

    Ubuntu 15.10:
    linux-image-4.2.0-30-generic 4.2.0-30.36
    linux-image-4.2.0-30-generic-lpae 4.2.0-30.36
    linux-image-4.2.0-30-lowlatency 4.2.0-30.36
    linux-image-4.2.0-30-powerpc-e500mc 4.2.0-30.36
    linux-image-4.2.0-30-powerpc-smp 4.2.0-30.36
    linux-image-4.2.0-30-powerpc64-emb 4.2.0-30.36
    linux-image-4.2.0-30-powerpc64-smp 4.2.0-30.36

    After a standard system update you need to reboot your computer to make
    all the necessary changes.

    References:
    http://www.ubuntu.com/usn/usn-2908-4
    http://www.ubuntu.com/usn/usn-2908-1
    https://launchpad.net/bugs/1548587

    Package Information:
    https://launchpad.net/ubuntu/+source/linux/4.2.0-30.36

    ReplyDelete
  9. ==========================================================================
    Ubuntu Security Notice USN-2904-1
    March 08, 2016

    thunderbird vulnerabilities
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Black Lab Linux 5.x/6.x/7.x
    - Ubuntu 15.10
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS

    Summary:

    Several security issues were fixed in Thunderbird.

    Software Description:
    - thunderbird: Mozilla Open Source mail and newsgroup client

    Details:

    Karthikeyan Bhargavan and Gaetan Leurent discovered that NSS incorrectly
    allowed MD5 to be used for TLS 1.2 connections. If a remote attacker were
    able to perform a man-in-the-middle attack, this flaw could be exploited to
    view sensitive information. (CVE-2015-7575)

    Yves Younan discovered that graphite2 incorrectly handled certain malformed
    fonts. If a user were tricked into opening a specially crafted website in a
    browsing context, an attacker could potentially exploit this to cause a
    denial of service via application crash, or execute arbitary code with the
    privileges of the user invoking Thunderbird. (CVE-2016-1523)

    Bob Clary, Christian Holler, Nils Ohlmeier, Gary Kwong, Jesse Ruderman,
    Carsten Book, and Randell Jesup discovered multiple memory safety issues
    in Thunderbird. If a user were tricked in to opening a specially crafted
    website in a browsing context, an attacker could potentially exploit these
    to cause a denial of service via application crash, or execute arbitrary
    code with the privileges of the user invoking Thunderbird. (CVE-2016-1930)

    Aki Helin discovered a buffer overflow when rendering WebGL content in
    some circumstances. If a user were tricked in to opening a specially
    crafted website in a browsing context, an attacker could potentially
    exploit this to cause a denial of service via application crash, or
    execute arbitrary code with the privileges of the user invoking
    Thunderbird. (CVE-2016-1935)

    Update instructions:

    The problem can be corrected by updating your system to the following
    package versions:

    Ubuntu 15.10:
    thunderbird 1:38.6.0+build1-0ubuntu0.15.10.1

    Ubuntu 14.04 LTS:
    thunderbird 1:38.6.0+build1-0ubuntu0.14.04.1

    Ubuntu 12.04 LTS:
    thunderbird 1:38.6.0+build1-0ubuntu0.12.04.1

    After a standard system update you need to restart Thunderbird to make
    all the necessary changes.

    References:
    http://www.ubuntu.com/usn/usn-2904-1
    CVE-2015-7575, CVE-2016-1523, CVE-2016-1930, CVE-2016-1935

    Package Information:
    https://launchpad.net/ubuntu/+source/thunderbird/1:38.6.0+build1-0ubuntu0.15.10.1
    https://launchpad.net/ubuntu/+source/thunderbird/1:38.6.0+build1-0ubuntu0.14.04.1
    https://launchpad.net/ubuntu/+source/thunderbird/1:38.6.0+build1-0ubuntu0.12.04.1

    ReplyDelete
  10. Security Notice USN-2959-1
    May 03, 2016

    openssl vulnerabilities
    ==========================================================================

    A security issue affects these releases of Ubuntu and its derivatives:

    - Black Lab Linux 4.x/5.x
    - Black Lab Linux 6.x/7.x
    - Ubuntu 16.04 LTS
    - Ubuntu 15.10
    - Ubuntu 14.04 LTS
    - Ubuntu 12.04 LTS

    Summary:

    Several security issues were fixed in OpenSSL.

    Software Description:
    - openssl: Secure Socket Layer (SSL) cryptographic library and tools

    Details:

    Huzaifa Sidhpurwala, Hanno Böck, and David Benjamin discovered that OpenSSL
    incorrectly handled memory when decoding ASN.1 structures. A remote
    attacker could use this issue to cause OpenSSL to crash, resulting in a
    denial of service, or possibly execute arbitrary code. (CVE-2016-2108)

    Juraj Somorovsky discovered that OpenSSL incorrectly performed padding when
    the connection uses the AES CBC cipher and the server supports AES-NI. A
    remote attacker could possibly use this issue to perform a padding oracle
    attack and decrypt traffic. (CVE-2016-2107)

    Guido Vranken discovered that OpenSSL incorrectly handled large amounts of
    input data to the EVP_EncodeUpdate() function. A remote attacker could use
    this issue to cause OpenSSL to crash, resulting in a denial of service, or
    possibly execute arbitrary code. (CVE-2016-2105)

    Guido Vranken discovered that OpenSSL incorrectly handled large amounts of
    input data to the EVP_EncryptUpdate() function. A remote attacker could use
    this issue to cause OpenSSL to crash, resulting in a denial of service, or
    possibly execute arbitrary code. (CVE-2016-2106)

    Brian Carpenter discovered that OpenSSL incorrectly handled memory when
    ASN.1 data is read from a BIO. A remote attacker could possibly use this
    issue to cause memory consumption, resulting in a denial of service.
    (CVE-2016-2109)

    As a security improvement, this update also modifies OpenSSL behaviour to
    reject DH key sizes below 1024 bits, preventing a possible downgrade
    attack.

    ReplyDelete