CVE-2017-17806

Advisory lineage Upstream: 0 Downstream: 19
Modified
Published: 20 Dec 2017, 23:00
Last modified:05 Aug 2024, 20:59

Vulnerability Summary

Overall Risk (default)
medium
31/100
CVSS Score
7.8 HIGH
v3.1 (nvd)
EPSS Score
0.01% LOW
0% probability -0.01%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

20 Dec 2017, 23:00
Published
Vulnerability first disclosed
05 Aug 2024, 20:59
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•HIGH•Score: 7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • v2.0•HIGH•Score: 7.2AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS Trends

Current EPSS score: 0.01%• Percentile: 3%

Techniques & Countermeasures

  • CWE-787•Out-of-bounds Write

    The product writes data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • canonical•ubuntu_linux

    12.04 | 14.04 | 16.04 | 17.10

  • debian•debian_linux

    8.0 | 9.0

  • linux•linux_kernel

    < 3.2.97 | ≥ 3.3, < 3.16.52 | ≥ 3.17, < 3.18.89 | ≥ 3.19, < 4.1.49 | ≥ 4.2, < 4.4.107 | ≥ 4.5, < 4.9.71 | ≥ 4.10, < 4.14.8

  • opensuse_project•leap

    42.3

  • opensuse•leap

    42.2

  • suse•linux_enterprise_desktop

    12:sp2 | 12:sp3

  • suse•linux_enterprise_server

    11:extra | 11:sp4 | 12:sp2 | 12:sp3

  • suse•linux_enterprise_server_for_raspberry_pi

    12:sp2

References (21)