Is CVE-2020-11945 actively exploited?

CVE-2020-11945 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2020-11945?

CVE-2020-11945 has a CVSS score of 9.8 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

How do I patch CVE-2020-11945?

Patch guidance is available from squid-cache security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2020-11945.

Fix CVE-2020-11945 - CRITICAL squid-cache squid

Q: Which products are affected by CVE-2020-11945?

13 products: squid-cache squid, squid-cache squid, squid-cache squid, debian debian linux, debian debian linux, and 8 more.

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).

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-190 · Integer Overflow

Metadata

Primary Vendor: SQUID-CACHE
Published: 4/23/2020
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

squid-cache : squidsquid-cache : squidsquid-cache : squiddebian : debian_linuxdebian : debian_linuxopensuse : leapfedoraproject : fedorafedoraproject : fedorafedoraproject : fedoracanonical : ubuntu_linuxcanonical : ubuntu_linuxcanonical : ubuntu_linuxcanonical : ubuntu_linux

Remediation Guidance

Executive Summary

Cite this page

CVE-2020-11945. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2020-11945

View on NIST NVD

CVE-2020-11945 vulnerability