CVE-2009-2692

Vulnerability Description

The Linux kernel 2.6.0 through 2.6.30.4, and 2.4.4 through 2.4.37.4, does not initialize all function pointers for socket operations in proto_ops structures, which allows local users to trigger a NULL pointer dereference and gain privileges by using mmap to map page zero, placing arbitrary code on this page, and then invoking an unavailable operation, as demonstrated by the sendpage operation (sock_sendpage function) on a PF_PPPOX socket.

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• http://archives.neohapsis.com/archives/fulldisclosure/2009-08/0174.htmlBroken LinkExploit
• http://blog.cr0.org/2009/08/linux-null-pointer-dereference-due-to.htmlExploitIssue Tracking
• http://git.kernel.org/?p=linux/kernel/git/stable/linux-2.4.37.y.git%3Ba=commit%3Broken Link
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=Broken Link
• http://grsecurity.net/~spender/wunderbar_emporium.tgzBroken Link
• http://lists.opensuse.org/opensuse-security-announce/2009-09/msg00001.htmlMailing List
• http://rhn.redhat.com/errata/RHSA-2009-1222.htmlThird Party Advisory
• http://rhn.redhat.com/errata/RHSA-2009-1223.htmlThird Party Advisory
• http://secunia.com/advisories/36278Broken LinkVendor Advisory
• http://secunia.com/advisories/36289Broken LinkVendor Advisory
• http://secunia.com/advisories/36327Broken LinkVendor Advisory
• http://secunia.com/advisories/36430Broken LinkVendor Advisory
• http://secunia.com/advisories/37298Broken LinkVendor Advisory
• http://secunia.com/advisories/37471Broken LinkVendor Advisory
• http://support.avaya.com/css/P8/documents/100067254Third Party Advisory