CVE-2013-2128

The tcp_read_sock function in net/ipv4/tcp.c in the Linux kernel before 2.6.34 does not properly manage skb consumption, which allows local users to cause a denial of service (system crash) via a crafted splice system call for a TCP socket.

Weakness

The product does not properly control the allocation and maintenance of a limited resource.

Affected Software

Potential Mitigations

• Mitigation of resource exhaustion attacks requires that the target system either:

• The first of these solutions is an issue in itself though, since it may allow attackers to prevent the use of the system by a particular valid user. If the attacker impersonates the valid user, they may be able to prevent the user from accessing the server in question.

• The second solution is simply difficult to effectively institute – and even when properly done, it does not provide a full solution. It simply makes the attack require more resources on the part of the attacker.

Related Attack Patterns

• https://cwe.mitre.org/data/definitions/147.html
• https://cwe.mitre.org/data/definitions/227.html
• https://cwe.mitre.org/data/definitions/492.html

References

• http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.34
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=baff42ab1494528907bf4d5870359e31711746ae
• http://rhn.redhat.com/errata/RHSA-2013-1051.html
• http://www.openwall.com/lists/oss-security/2013/05/29/11
• https://bugzilla.redhat.com/show_bug.cgi?id=968484
• https://github.com/torvalds/linux/commit/baff42ab1494528907bf4d5870359e31711746ae
• http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.34
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=baff42ab1494528907bf4d5870359e31711746ae
• http://rhn.redhat.com/errata/RHSA-2013-1051.html
• http://www.openwall.com/lists/oss-security/2013/05/29/11
• https://bugzilla.redhat.com/show_bug.cgi?id=968484
• https://github.com/torvalds/linux/commit/baff42ab1494528907bf4d5870359e31711746ae