SB2016052314 - Use-after-free in Linux kernel bpf
Published: May 23, 2016 Updated: June 3, 2024
Security Bulletin ID
SB2016052314
Severity
Low
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 security vulnerability.
1) Use-after-free (CVE-ID: CVE-2016-4557)
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to a use-after-free error within the replace_map_fd_with_map_ptr() function in kernel/bpf/verifier.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's website.
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
- https://bugzilla.redhat.com/show_bug.cgi?id=1334307
- https://github.com/torvalds/linux/commit/8358b02bf67d3a5d8a825070e1aa73f25fb2e4c7
- https://bugs.chromium.org/p/project-zero/issues/detail?id=808
- https://bugs.debian.org/823603
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.5.5
- http://www.openwall.com/lists/oss-security/2016/05/06/4
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00044.html
- https://www.exploit-db.com/exploits/40759/