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Red Hat: CVE-2017-17805: Important: kernel-alt security, bug fix, and enhancement update (Multiple Advisories)

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Red Hat: CVE-2017-17805: Important: kernel-alt security, bug fix, and enhancement update (Multiple Advisories)

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 Salsa20 encryption algorithm in the Linux kernel before 4.14.8 does not correctly handle zero-length inputs, allowing a local attacker able to use the AF_ALG-based skcipher interface (CONFIG_CRYPTO_USER_API_SKCIPHER) to cause a denial of service (uninitialized-memory free and kernel crash) or have unspecified other impact by executing a crafted sequence of system calls that use the blkcipher_walk API. Both the generic implementation (crypto/salsa20_generic.c) and x86 implementation (arch/x86/crypto/salsa20_glue.c) of Salsa20 were vulnerable.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

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