SB2012062216 - Input validation error in Linux kernel

Description

This security bulletin contains information about 1 vulnerability.

1) Input validation error (CVE-ID: CVE-2011-1023)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote non-authenticated attacker to perform a denial of service (DoS) attack.

The Reliable Datagram Sockets (RDS) subsystem in the Linux kernel before 2.6.38 does not properly handle congestion map updates, which allows local users to cause a denial of service (BUG_ON and system crash) via vectors involving (1) a loopback (aka loop) transmit operation or (2) an InfiniBand (aka ib) transmit operation.

Remediation

Install update from vendor's website.

References

• http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=6094628bfd94323fc1cea05ec2c6affd98c18f7f
• http://www.openwall.com/lists/oss-security/2011/03/03/2
• https://bugzilla.redhat.com/show_bug.cgi?id=680345
• https://github.com/torvalds/linux/commit/6094628bfd94323fc1cea05ec2c6affd98c18f7f