Home/CVE/The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the underlying cryptogr
CVE

CVE-2017-17806

The HMAC implementation (crypto/hmac.c) in the Linux kernel before 4.14.8 does not validate that the underlying cryptogr

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.

HIGH · CVSS 7.8 EPSS 0.00014
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-787Out-of-bounds Write
▤

Affected Products & Versions

14
linux kernel< 3.2.97
linux kernel>= 3.3 and < 3.16.52
linux kernel>= 3.17 and < 3.18.89
linux kernel>= 3.19 and < 4.1.49
linux kernel>= 4.2 and < 4.4.107
linux kernel>= 4.5 and < 4.9.71
linux kernel>= 4.10 and < 4.14.8
debian linuxall versions
▣

Scoring & Timeline

7.8
HIGH · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD20 Dec 2017 · 11:29 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
⚑

Vendor Advisories

18
rhsaRHSA-2018:2948Important
android-securityANDROID-2018-06-01High
usnUSN-3632-1
usnUSN-3619-2
usnUSN-3619-1
🔗

References & Sources

20
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3ff8045bbf3e32f1a448542e73abb4c8ceb6f1Patch
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00006.htmlIssue TrackingPatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00007.htmlIssue TrackingPatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00008.htmlIssue TrackingPatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00014.htmlIssue TrackingPatchThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2018-01/msg00016.htmlIssue TrackingThird Party Advisory
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