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Red Hat: CVE-2017-17806: Important: kernel-alt security, bug fix, and enhancement update (RHSA-2018:2948)

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Red Hat: CVE-2017-17806: Important: kernel-alt security, bug fix, and enhancement update (RHSA-2018:2948)

Severity
7
CVSS
(AV:L/AC:L/Au:N/C:C/I:C/A:C)
Published
12/20/2017
Created
03/19/2019
Added
10/31/2018
Modified
03/03/2021

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.

Solution(s)

  • redhat-upgrade-kernel

References

  • 102293
  • DSA-4073
  • DSA-4082
  • CVE-2017-17806
  • RHSA-2018:2948

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