CVE-2017-16939
Description
The XFRM dump policy implementation in net/xfrm/xfrm_user.c in the Linux kernel before 4.13.11 allows local users to gain privileges or cause a denial of service (use-after-free) via a crafted SO_RCVBUF setsockopt system call in conjunction with XFRM_MSG_GETPOLICY Netlink messages.
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
No mitigations published for this CVE yet.
The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.
✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here withsource_tier=community-verified.
Exploits
Public proof-of-concept code below. AS-IS, for defenders and authorised testing only.
Exploit-DB
Linux Kernel (Ubuntu 17.04) - 'XFRM' Local Privilege Escalation
OS impact
Linux kernel Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | 3.2.97 |
SUSE Affected 1 release
| Version | Status | Fixed in |
|---|---|---|
| — | Affected | — |
Debian Mixed 6 releases
| Version | Status | Fixed in |
|---|---|---|
| trixie | Fixed | 4.13.13-1 |
| sid | Fixed | 4.13.13-1 |
| forky | Fixed | 4.13.13-1 |
| bullseye | Fixed | 4.13.13-1 |
| bookworm | Fixed | 4.13.13-1 |
| 8.0 | Affected | — |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=1137b5e2529a8f5ca8ee709288ecba3e68044df2
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
- http://seclists.org/fulldisclosure/2017/Nov/40
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.11
- http://www.securityfocus.com/bid/101954
- https://access.redhat.com/errata/RHSA-2018:1318
- https://access.redhat.com/errata/RHSA-2018:1355
- https://access.redhat.com/errata/RHSA-2019:1170
- https://access.redhat.com/errata/RHSA-2019:1190
- https://blogs.securiteam.com/index.php/archives/3535
- https://bugzilla.suse.com/show_bug.cgi?id=1069702
- https://github.com/torvalds/linux/commit/1137b5e2529a8f5ca8ee709288ecba3e68044df2
- https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
- https://www.debian.org/security/2018/dsa-4082
- https://www.suse.com/security/cve/CVE-2017-16939.html
- https://security-tracker.debian.org/tracker/CVE-2017-16939
CWEs
CWE-416
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.