CVE-2013-6763

Published: 12 November 2013

The uio_mmap_physical function in drivers/uio/uio.c in the Linux kernel before 3.12 does not validate the size of a memory block, which allows local users to cause a denial of service (memory corruption) or possibly gain privileges via crafted mmap operations, a different vulnerability than CVE-2013-4511.

From the Ubuntu security team

Nico Golde reported a flaw in the Linux kernel's userspace IO (uio) driver. A local user could exploit this flaw to cause a denial of service (memory corruption) or possibly gain privileges.

Notes

Marked 'low' because uio_mmap_physical()'s only caller does length
checking before the call, see the 12 November 2013 oss-security mail from
Petr Matousek.

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2013-6763
• https://www.kernel.org/pub/linux/kernel/v3.x/patch-3.12.bz2
• https://github.com/torvalds/linux/commit/7314e613d5ff9f0934f7a0f74ed7973b903315d1
• http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=7314e613d5ff9f0934f7a0f74ed7973b903315d1
• http://www.openwall.com/lists/oss-security/2013/11/04/22
• http://www.openwall.com/lists/oss-security/2013/11/12/1
• https://ubuntu.com/security/notices/USN-2064-1
• https://ubuntu.com/security/notices/USN-2065-1
• https://ubuntu.com/security/notices/USN-2066-1
• https://ubuntu.com/security/notices/USN-2067-1
• https://ubuntu.com/security/notices/USN-2068-1
• https://ubuntu.com/security/notices/USN-2069-1
• https://ubuntu.com/security/notices/USN-2070-1
• https://ubuntu.com/security/notices/USN-2071-1
• https://ubuntu.com/security/notices/USN-2072-1
• https://ubuntu.com/security/notices/USN-2073-1
• https://ubuntu.com/security/notices/USN-2074-1
• https://ubuntu.com/security/notices/USN-2075-1
• https://ubuntu.com/security/notices/USN-2076-1
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/1252426