Improper Input Validation Affecting torvalds/linux package, versions [,4.11)


Severity

Recommended
0.0
high
0
10

CVSS assessment by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
0.84% (53rd percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3006564
  • published26 Jan 2022
  • disclosed13 Aug 2019
  • creditUnknown

Introduced: 13 Aug 2019

CVE-2017-18509  (opens in a new tab)
CWE-20  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 4.11 or higher.

Overview

Affected versions of this package are vulnerable to Improper Input Validation. An issue was discovered in net/ipv6/ip6mr.c in the Linux kernel before 4.11. By setting a specific socket option, an attacker can control a pointer in kernel land and cause an inet_csk_listen_stop general protection fault, or potentially execute arbitrary code under certain circumstances. The issue can be triggered as root (e.g., inside a default LXC container or with the CAP_NET_ADMIN capability) or after namespace unsharing. This occurs because sk_type and protocol are not checked in the appropriate part of the ip6_mroute_* functions. NOTE: this affects Linux distributions that use 4.9.x longterm kernels before 4.9.187.

CVSS Base Scores

version 3.1