CVE-2011-1573

Severity: medium (CVSS 5.9 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 2.7% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-02-02 · updated 2026-06-16
Weakness: CWE-682

Description

net/sctp/sm_make_chunk.c in the Linux kernel before 2.6.34, when addip_enable and auth_enable are used, does not consider the amount of zero padding during calculation of chunk lengths for (1) INIT and (2) INIT ACK chunks, which allows remote attackers to cause a denial of service (OOPS) via crafted packet data.

Affected products

Linux kernel: before 2.6.34 — fixed in 2.6.34

How to fix

Upgrade to a fixed version: Linux kernel 2.6.34. Check the vendor advisory for mitigations.

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a8170c35e738d62e9919ce5b109cf4ed66e95bde
http://mirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.34
http://openwall.com/lists/oss-security/2011/04/11/12
http://openwall.com/lists/oss-security/2011/04/11/4
http://rhn.redhat.com/errata/RHSA-2011-0927.html
https://bugzilla.redhat.com/show_bug.cgi?id=695383
http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=a8170c35e738d62e9919ce5b109cf4ed66e95bde
http://mirror.anl.gov/pub/linux/kernel/v2.6/ChangeLog-2.6.34
http://openwall.com/lists/oss-security/2011/04/11/12
http://openwall.com/lists/oss-security/2011/04/11/4
http://rhn.redhat.com/errata/RHSA-2011-0927.html
https://bugzilla.redhat.com/show_bug.cgi?id=695383

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