Out-of-bounds Write Affecting torvalds/linux package, versions [3.10,3.11)[4.14,4.14.82)[4.18,4.18.20)


Severity

Recommended
0.0
high
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

EPSS
7.84% (92nd percentile)

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  • Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-3004589
  • published26 Jan 2022
  • disclosed25 Sept 2018
  • creditUnknown

Introduced: 25 Sep 2018

CVE-2018-14633  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade torvalds/linux to version 3.11, 4.14.82, 4.18.20 or higher.

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write. A security flaw was found in the chap_server_compute_md5() function in the ISCSI target code in the Linux kernel in a way an authentication request from an ISCSI initiator is processed. An unauthenticated remote attacker can cause a stack buffer overflow and smash up to 17 bytes of the stack. The attack requires the iSCSI target to be enabled on the victim host. Depending on how the target's code was built (i.e. depending on a compiler, compile flags and hardware architecture) an attack may lead to a system crash and thus to a denial-of-service or possibly to a non-authorized access to data exported by an iSCSI target. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is highly unlikely. Kernel versions 4.18.x, 4.14.x and 3.10.x are believed to be vulnerable.

References

CVSS Base Scores

version 3.1