CVE-2017-17806
Description
The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the underlying cryptographic hash algorithm is unkeyed, allowing a local attacker able to use the AF_ALG-based hash interface (CONFIG_CRYPTO_USER_API_HASH) and the SHA-3 hash algorithm (CONFIG_CRYPTO_SHA3) to cause a kernel stack buffer overflow by executing a crafted sequence of system calls that encounter a missing SHA-3 initialization.
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 |
|---|---|---|---|
| arch | fixed | 4.14.11.a-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 4.14.7-1 |
| debian | bullseye | fixed | 4.14.7-1 |
| debian | forky | fixed | 4.14.7-1 |
| debian | sid | fixed | 4.14.7-1 |
| debian | trixie | fixed | 4.14.7-1 |
| linux-kernel | affected | 3.2.97 | |
| debian | 8.0 | affected | |
| debian | 9.0 | affected | |
| suse | 42.2 | affected | |
| suse | 12 | affected | |
| suse | 11 | affected | |
| ubuntu | 12.04 | affected | |
| ubuntu | 14.04 | affected | |
| ubuntu | 16.04 | affected | |
| ubuntu | 17.10 | affected | |
References
- https://security.archlinux.org/ASA-201801-4
- https://security.archlinux.org/ASA-201801-3
- https://security.archlinux.org/ASA-201801-2
- https://security.archlinux.org/ASA-201801-1
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.html
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.html
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.html
- http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.html
- http://www.securityfocus.com/bid/102293
- https://access.redhat.com/errata/RHSA-2018:2948
- https://github.com/torvalds/linux/commit/af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1
- https://lists.debian.org/debian-lts-announce/2018/01/msg00004.html
- https://usn.ubuntu.com/3583-1/
- https://usn.ubuntu.com/3583-2/
- https://usn.ubuntu.com/3617-1/
- https://usn.ubuntu.com/3617-2/
- https://usn.ubuntu.com/3617-3/
- https://usn.ubuntu.com/3619-1/
- https://usn.ubuntu.com/3619-2/
- https://usn.ubuntu.com/3632-1/
- https://www.debian.org/security/2017/dsa-4073
- https://www.debian.org/security/2018/dsa-4082
- https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.14.8
CWEs
CWE-787
Community-verified mitigations for this CVE will appear above when contributors publish them.
Verify integrity in audit chain (admin only). AS-IS.