CVE-2014-9728

Published: 31 December 2014

The UDF filesystem implementation in the Linux kernel before 3.18.2 does not validate certain lengths, which allows local users to cause a denial of service (buffer over-read and system crash) via a crafted filesystem image, related to fs/udf/inode.c and fs/udf/symlink.c.

From the Ubuntu Security Team

Carl H Lunde discovered that the UDF file system (CONFIG_UDF_FS) failed to verify symlink size info. 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-2014-9728
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e159332b9af4b04d882dbcfe1bb0117f0a6d4b58 (v3.19-rc3)
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e237ec37ec154564f8690c5bd1795339955eeef9 (v3.19-rc3)
• https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=a1d47b262952a45aae62bd49cfaf33dd76c11a2c (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/1462164