Is CVE-2020-8517 actively exploited?

CVE-2020-8517 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2020-8517?

CVE-2020-8517 has a CVSS score of 7.5 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

How do I patch CVE-2020-8517?

Patch guidance is available from squid-cache security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2020-8517.

Fix CVE-2020-8517 - HIGH squid-cache squid

Q: Which products are affected by CVE-2020-8517?

5 products: squid-cache squid, opensuse leap, canonical ubuntu linux, canonical ubuntu linux, canonical ubuntu linux.

Description

An issue was discovered in Squid before 4.10. Due to incorrect input validation, the NTLM authentication credentials parser in ext_lm_group_acl may write to memory outside the credentials buffer. On systems with memory access protections, this can result in the helper process being terminated unexpectedly. This leads to the Squid process also terminating and a denial of service for all clients using the proxy.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector: network
Complexity: low
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: none
Integrity: none
Availability: high
Weaknesses: CWE-20 · Improper Input Validation CWE-787 · Out-of-bounds Write

Metadata

Primary Vendor: SQUID-CACHE
Published: 2/4/2020
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

squid-cache : squidopensuse : leapcanonical : ubuntu_linuxcanonical : ubuntu_linuxcanonical : ubuntu_linux

Remediation Guidance

Executive Summary

Cite this page

CVE-2020-8517. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2020-8517

View on NIST NVD

CVE-2020-8517 vulnerability