CWE
416
Advisory Published

USN-1793-1: Linux kernel vulnerabilities

First published: Mon Apr 08 2013(Updated: )

Emese Revfy discovered that in the Linux kernel signal handlers could leak address information across an exec, making it possible to by pass ASLR (Address Space Layout Randomization). A local user could use this flaw to by pass ASLR to reliably deliver an exploit payload that would otherwise be stopped (by ASLR). (CVE-2013-0914) A memory use after free error was discover in the Linux kernel's tmpfs filesystem. A local user could exploit this flaw to gain privileges or cause a denial of service (system crash). (CVE-2013-1767) Mateusz Guzik discovered a race in the Linux kernel's keyring. A local user could exploit this flaw to cause a denial of service (system crash). (CVE-2013-1792) Mathias Krause discovered a memory leak in the Linux kernel's crypto report API. A local user with CAP_NET_ADMIN could exploit this leak to examine some of the kernel's stack memory. (CVE-2013-2546) Mathias Krause discovered a memory leak in the Linux kernel's crypto report API. A local user with CAP_NET_ADMIN could exploit this leak to examine some of the kernel's heap memory. (CVE-2013-2547) Mathias Krause discovered information leaks in the Linux kernel's crypto algorithm report API. A local user could exploit these flaws to leak kernel stack and heap memory contents. (CVE-2013-2548)

Affected SoftwareAffected VersionHow to fix
All of
ubuntu/linux-image-3.2.0-40-omap<3.2.0-40.64
3.2.0-40.64
Ubuntu 22.04 LTS=12.04
All of
ubuntu/linux-image-3.2.0-40-generic<3.2.0-40.64
3.2.0-40.64
Ubuntu 22.04 LTS=12.04
All of
ubuntu/linux-image-3.2.0-40-powerpc-smp<3.2.0-40.64
3.2.0-40.64
Ubuntu 22.04 LTS=12.04
All of
ubuntu/linux-image-3.2.0-40-powerpc64-smp<3.2.0-40.64
3.2.0-40.64
Ubuntu 22.04 LTS=12.04
All of
ubuntu/linux-image-3.2.0-40-virtual<3.2.0-40.64
3.2.0-40.64
Ubuntu 22.04 LTS=12.04
All of
ubuntu/linux-image-3.2.0-40-generic-pae<3.2.0-40.64
3.2.0-40.64
Ubuntu 22.04 LTS=12.04
All of
ubuntu/linux-image-3.2.0-40-highbank<3.2.0-40.64
3.2.0-40.64
Ubuntu 22.04 LTS=12.04

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Reference Links

Child vulnerabilities

(Contains the following vulnerabilities)

Frequently Asked Questions

  • What is the severity of USN-1793-1?

    The severity of USN-1793-1 is high, as it allows local users to bypass address space layout randomization (ASLR).

  • How do I fix USN-1793-1?

    To fix USN-1793-1, update your Linux kernel to version 3.2.0-40.64 or later for affected Ubuntu 12.04 systems.

  • What are the affected systems for USN-1793-1?

    USN-1793-1 affects Ubuntu 12.04 systems running specific versions of the Linux kernel.

  • What are the potential impacts of USN-1793-1?

    The potential impacts of USN-1793-1 include increased risk of exploitation through reliable delivery of payloads due to the bypass of ASLR.

  • Who discovered the vulnerability addressed by USN-1793-1?

    The vulnerability addressed by USN-1793-1 was discovered by Emese Revfy.

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