CVE-2020-11945
squid: improper access restriction upon Digest Authentication nonce replay could lead to remote code execution
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · April 24, 2020
Updated · November 22, 2025
Description
A flaw was found in Squid, where a remote attacker can replay a sniffed Digest Authentication nonce to gain access to resources that are otherwise forbidden. This issue occurs because the attacker can overflow the nonce reference counter, which results in remote code execution if the pooled token credentials are freed.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 8.1CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE-284 · Improper Access Control