SB2011011111 - Race condition in Linux kernel

Description

This security bulletin contains information about 1 vulnerability.

1) Race condition (CVE-ID: CVE-2010-4526)

CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/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.

Race condition in the sctp_icmp_proto_unreachable function in net/sctp/input.c in Linux kernel 2.6.11-rc2 through 2.6.33 allows remote attackers to cause a denial of service (panic) via an ICMP unreachable message to a socket that is already locked by a user, which causes the socket to be freed and triggers list corruption, related to the sctp_wait_for_connect function.

Remediation

Install update from vendor's website.

References

• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commitdiff;h=50b5d6ad63821cea324a5a7a19854d4de1a0a819
• http://secunia.com/advisories/42964
• http://secunia.com/advisories/46397
• http://www.openwall.com/lists/oss-security/2011/01/04/13
• http://www.openwall.com/lists/oss-security/2011/01/04/3
• http://www.redhat.com/support/errata/RHSA-2011-0163.html
• http://www.securityfocus.com/archive/1/520102/100/0/threaded
• http://www.securityfocus.com/bid/45661
• http://www.vmware.com/security/advisories/VMSA-2011-0012.html
• http://www.vupen.com/english/advisories/2011/0169
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2010-4526
• https://exchange.xforce.ibmcloud.com/vulnerabilities/64616