CVE-2014-9730

Published: 31 December 2014

The udf_pc_to_char function in fs/udf/symlink.c in the Linux kernel before 3.18.2 relies on component lengths that are unused, which allows local users to cause a denial of service (system crash) via a crafted UDF filesystem image.

From the Ubuntu Security Team

Carl H Lunde discovered that the UDF file system (CONFIG_UDF_FS) did not correctly verify the component length for symlinks. A local attacker, who is able to mount a malicous UDF file system image, could exploit this flaw to cause a denial of service (system crash) or possibly cause other undesired behaviors.

Notes

android kernels (flo, goldfish, grouper, maguro, mako and manta) are
not supported on the Ubuntu Touch 14.10 and earlier preview kernels
linux-lts-saucy no longer receives official support
linux-lts-quantal no longer receives official support

Status

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2014-9730
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e237ec37ec154564f8690c5bd1795339955eeef9 (v3.19-rc3)
• http://www.openwall.com/lists/oss-security/2015/06/02/7
• https://ubuntu.com/security/notices/USN-2517-1
• https://ubuntu.com/security/notices/USN-2518-1
• https://ubuntu.com/security/notices/USN-2541-1
• https://ubuntu.com/security/notices/USN-2542-1
• https://ubuntu.com/security/notices/USN-2543-1
• https://ubuntu.com/security/notices/USN-2544-1
• NVD
• Launchpad
• Debian

Bugs

• https://launchpad.net/bugs/1462167