SB2016111614 - Use-after-free in Linux kernel ext4
Published: November 16, 2016
Security Bulletin ID
SB2016111614
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2015-8961)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 8.4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local non-authenticated attacker to execute arbitrary code.
The vulnerability exists due to a use-after-free error within the __ext4_journal_stop() function in fs/ext4/ext4_jbd2.c. A local non-authenticated attacker can execute arbitrary code.
Remediation
Install update from vendor's website.
References
- https://github.com/torvalds/linux/commit/6934da9238da947628be83635e365df41064b09b
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.3.3
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6934da9238da947628be83635e365df41064b09b
- https://source.android.com/security/bulletin/2016-11-01.html
- http://www.securityfocus.com/bid/94135