CVEvulnerability

CVE-2020-11945

9.8 CRITICAL Published 2020-04-23 Modified 2026-06-17 Official page ↗
Status
Modified
Published
2020-04-23
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
9.8 CRITICAL — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.0 ([email protected])
7.5 HIGH — AV:N/AC:L/Au:N/C:P/I:P/A:P
Weaknesses
CWE-190

Description

An issue was discovered in Squid before 5.0.2. A remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This occurs because the attacker can overflow the nonce reference counter (a short integer). Remote code execution may occur if the pooled token credentials are freed (instead of replayed as valid credentials).

Affected configurations

• squid-cache squid (>= 3.0 <= 3.5.28) • squid-cache squid (>= 4.0 < 4.11) • squid-cache squid (>= 5.0 < 5.0.2) • debian debian linux 9.0 • debian debian linux 10.0 • opensuse leap 15.1 • fedoraproject fedora 30 • fedoraproject fedora 31 • fedoraproject fedora 32 • canonical ubuntu linux 16.04 • canonical ubuntu linux 18.04 • canonical ubuntu linux 19.10 • canonical ubuntu linux 20.04

Related

Weakness · CWE (1)

  • CWE-190 Integer Overflow or Wraparound weakness

References