CVE-2017-15649
Description
net/packet/af_packet.c in the Linux kernel before 4.13.6 allows local users to gain privileges via crafted system calls that trigger mishandling of packet_fanout data structures, because of a race condition (involving fanout_add and packet_do_bind) that leads to a use-after-free, a different vulnerability than CVE-2017-6346.
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 - 'AF_PACKET' Use-After-Free (2)
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| sles | affected | | |
| debian | bookworm | fixed | 4.13.10-1 |
| debian | bullseye | fixed | 4.13.10-1 |
| debian | forky | fixed | 4.13.10-1 |
| debian | sid | fixed | 4.13.10-1 |
| debian | trixie | fixed | 4.13.10-1 |
| linux-kernel | affected | |
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=008ba2a13f2d04c947adc536d19debb8fe66f110
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=4971613c1639d8e5f102c4e797c3bf8f83a5a69e
- http://patchwork.ozlabs.org/patch/813945/
- http://patchwork.ozlabs.org/patch/818726/
- http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.13.6
- http://www.securityfocus.com/bid/101573
- https://access.redhat.com/errata/RHSA-2018:0151
- https://access.redhat.com/errata/RHSA-2018:0152
- https://access.redhat.com/errata/RHSA-2018:0181
- https://blogs.securiteam.com/index.php/archives/3484
- https://github.com/torvalds/linux/commit/008ba2a13f2d04c947adc536d19debb8fe66f110
- https://github.com/torvalds/linux/commit/4971613c1639d8e5f102c4e797c3bf8f83a5a69e
- https://lists.debian.org/debian-lts-announce/2017/12/msg00004.html
- https://usn.ubuntu.com/3754-1/
- https://www.suse.com/security/cve/CVE-2017-15649.html
- https://security-tracker.debian.org/tracker/CVE-2017-15649
CWEs
CWE-362
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.