CWE
476
Advisory Published

USN-2775-1: Linux kernel (Trusty HWE) vulnerabilities

First published: Mon Oct 19 2015(Updated: )

It was discovered that the Linux kernel did not check if a new IPv6 MTU set by a user space application was valid. A remote attacker could forge a route advertisement with an invalid MTU that a user space daemon like NetworkManager would honor and apply to the kernel, causing a denial of service. (CVE-2015-0272) It was discovered that virtio networking in the Linux kernel did not handle fragments correctly, leading to kernel memory corruption. A remote attacker could use this to cause a denial of service (system crash) or possibly execute code with administrative privileges. (CVE-2015-5156) It was discovered that the Reliable Datagram Sockets (RDS) implementation in the Linux kernel did not verify sockets were properly bound before attempting to send a message, which could cause a NULL pointer dereference. An attacker could use this to cause a denial of service (system crash). (CVE-2015-6937) Ben Hutchings discovered that the Advanced Union Filesystem (aufs) for the Linux kernel did not correctly handle references of memory mapped files from an aufs mount. A local attacker could use this to cause a denial of service (system crash) or possibly execute arbitrary code with administrative privileges. (CVE-2015-7312)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-3.13.0-66-generic-lpae<3.13.0-66.108~precise1
3.13.0-66.108~precise1
=12.04
All of
ubuntu/linux-image-3.13.0-66-generic<3.13.0-66.108~precise1
3.13.0-66.108~precise1
=12.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-2775-1?

    The severity of USN-2775-1 is moderate.

  • How can a remote attacker exploit CVE-2015-0272?

    A remote attacker can exploit CVE-2015-0272 by forging a route advertisement with an invalid MTU, causing a denial of service.

  • What is the recommended remedy for CVE-2015-5156?

    The recommended remedy for CVE-2015-5156 is to upgrade to Linux kernel version 3.13.0-66.108~precise1 or later.

  • How can I check if I am affected by CVE-2015-6937?

    You can check if you are affected by CVE-2015-6937 by checking your Linux kernel version. If you are using version 3.13.0-66-generic or earlier, you are affected.

  • What is the Common Weakness Enumeration (CWE) number for this vulnerability?

    The Common Weakness Enumeration (CWE) number for this vulnerability is CWE-476.

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