CVE-2017-6347
Description
The ip_cmsg_recv_checksum function in net/ipv4/ip_sockglue.c in the Linux kernel before 4.10.1 has incorrect expectations about skb data layout, which allows local users to cause a denial of service (buffer over-read) or possibly have unspecified other impact via crafted system calls, as demonstrated by use of the MSG_MORE flag in conjunction with loopback UDP transmission.
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.
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 4.9.13-1 |
| debian | bullseye | fixed | 4.9.13-1 |
| debian | forky | fixed | 4.9.13-1 |
| debian | sid | fixed | 4.9.13-1 |
| debian | trixie | fixed | 4.9.13-1 |
| linux-kernel | affected | 4.4.52 |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.10.1
- http://www.openwall.com/lists/oss-security/2017/02/28/5
- http://www.securityfocus.com/bid/96487
- https://bugzilla.redhat.com/show_bug.cgi?id=1427984
- https://github.com/torvalds/linux/commit/ca4ef4574f1ee5252e2cd365f8f5d5bafd048f32
- https://www.suse.com/security/cve/CVE-2017-6347.html
- https://security-tracker.debian.org/tracker/CVE-2017-6347
CWEs
CWE-125
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.