low
2.1
CWE
264 200
Advisory Published
CVE Published
Updated

CVE-2011-2495: Infoleak

First published: Mon Jun 27 2011(Updated: )

/proc/PID/io may be used for gathering private information. E.g. for openssh and vsftpd daemons wchars/rchars may be used to learn the precise password length. [0/2] restrict statistics information to user <a href="https://lkml.org/lkml/2011/6/24/88">https://lkml.org/lkml/2011/6/24/88</a> [1/2] proc: restrict access to /proc/PID/io (<a href="https://access.redhat.com/security/cve/CVE-2011-2495">CVE-2011-2495</a>) <a href="https://patchwork.kernel.org/patch/916032/">https://patchwork.kernel.org/patch/916032/</a> [2/2] taskstats: restrict access to user (<a href="https://access.redhat.com/security/cve/CVE-2011-2494">CVE-2011-2494</a>) <a href="https://patchwork.kernel.org/patch/916042/">https://patchwork.kernel.org/patch/916042/</a> taskstats authorized_keys presence infoleak PoC <a href="http://seclists.org/oss-sec/2011/q2/659">http://seclists.org/oss-sec/2011/q2/659</a> Acknowledgements: Red Hat would like to thank Vasiliy Kulikov of Openwall for reporting this issue.

Credit: secalert@redhat.com

Affected SoftwareAffected VersionHow to fix
debian/linux-2.6
Linux kernel=2.6.39-rc7
Linux kernel=2.6.39-rc6
Linux kernel=2.6.39-rc4
Linux kernel=2.6.39.1
Linux kernel=2.6.39-rc1
Linux kernel=2.6.39-rc3
Linux kernel<=2.6.39.3
Linux kernel=2.6.39
Linux kernel=2.6.39-rc2
Linux kernel=2.6.39.2
Linux kernel=2.6.39-rc5
Linux Kernel<=2.6.39.3
Linux Kernel=2.6.39
Linux Kernel=2.6.39-rc1
Linux Kernel=2.6.39-rc2
Linux Kernel=2.6.39-rc3
Linux Kernel=2.6.39-rc4
Linux Kernel=2.6.39-rc5
Linux Kernel=2.6.39-rc6
Linux Kernel=2.6.39-rc7
Linux Kernel=2.6.39.1
Linux Kernel=2.6.39.2

Remedy

https://github.com/torvalds/linux/commit/1d1221f375c94ef961ba8574ac4f85c8870ddd51

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-2495?

    CVE-2011-2495 is considered a medium severity vulnerability due to its potential to leak sensitive information.

  • How do I fix CVE-2011-2495?

    To fix CVE-2011-2495, upgrade the Linux kernel to a version greater than or equal to 2.6.39.4.

  • Which systems are affected by CVE-2011-2495?

    CVE-2011-2495 affects specific versions of the Linux kernel, particularly version 2.6.39 and its release candidates.

  • Can CVE-2011-2495 be exploited remotely?

    CVE-2011-2495 is primarily a local vulnerability, requiring access to the affected system to exploit.

  • What types of information can be leaked through CVE-2011-2495?

    CVE-2011-2495 can potentially leak sensitive information such as the length of the passwords being used by processes running on the system.

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