Improper Input Validation Affecting kernel package, versions <0:2.6.32-754.18.2.el6


Severity

Recommended
high

Based on CentOS security rating.

Threat Intelligence

EPSS
0.04% (13th percentile)

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  • Snyk IDSNYK-CENTOS6-KERNEL-2156342
  • published26 Jul 2021
  • disclosed29 Nov 2017

Introduced: 29 Nov 2017

CVE-2017-17805  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade Centos:6 kernel to version 0:2.6.32-754.18.2.el6 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Centos. See How to fix? for Centos:6 relevant fixed versions and status.

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.

CVSS Scores

version 3.1