User Enumeration Affecting gnutls package, versions [,3.6.5)


Severity

Recommended
0.0
medium
0
10

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

Threat Intelligence

EPSS
0.05% (21st percentile)

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  • Snyk IDSNYK-UNMANAGED-GNUTLS-2374599
  • published26 Jan 2022
  • disclosed3 Dec 2018
  • creditUnknown

Introduced: 3 Dec 2018

CVE-2018-16868  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade gnutls to version 3.6.5 or higher.

Overview

Affected versions of this package are vulnerable to User Enumeration. A Bleichenbacher type side-channel based padding oracle attack was found in the way gnutls handles verification of RSA decrypted PKCS#1 v1.5 data. An attacker who is able to run process on the same physical core as the victim process, could use this to extract plaintext or in some cases downgrade any TLS connections to a vulnerable server.

CVSS Base Scores

version 3.1