Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 3.2.97 |
| Debian | Debian Linux | 8.0 |
| Opensuse | Leap | 42.2 |
| Opensuse Project | Leap | 42.3 |
| Suse | Linux Enterprise Desktop | 12 |
| Suse | Linux Enterprise Server | 11 |
| Suse | Linux Enterprise Server For Raspberry Pi | 12 |
| Canonical | Ubuntu Linux | 12.04 |
Related Weaknesses (CWE)
References
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=af3ff8Patch
- 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
- http://www.securityfocus.com/bid/102293Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:2948Third Party Advisory
- https://github.com/torvalds/linux/commit/af3ff8045bbf3e32f1a448542e73abb4c8ceb6fPatch
- https://lists.debian.org/debian-lts-announce/2018/01/msg00004.htmlThird Party Advisory
- https://usn.ubuntu.com/3583-1/Third Party Advisory
- https://usn.ubuntu.com/3583-2/Third Party Advisory
- https://usn.ubuntu.com/3617-1/Third Party Advisory
- https://usn.ubuntu.com/3617-2/Third Party Advisory
- https://usn.ubuntu.com/3617-3/Third Party Advisory
FAQ
What is CVE-2017-17806?
CVE-2017-17806 is a vulnerability with a CVSS score of 7.8 (HIGH). 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_AL...
How severe is CVE-2017-17806?
CVE-2017-17806 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2017-17806?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Debian Debian Linux, Opensuse Leap, Opensuse Project Leap, Suse Linux Enterprise Desktop.