Denial of Service Vulnerability in Squid Proxy Server by Squid Software
CVE-2021-28651

7.5HIGH

Key Information:

Vendor

Squid-cache

Status
Squid
Vendor
CVE Published:
27 May 2021

What is CVE-2021-28651?

A vulnerability has been identified in Squid Proxy Server that can lead to a denial of service due to a buffer-management issue. When processing requests that use the 'urn:' scheme, an incorrect memory handling approach allows for a minor memory leak. Even more concerning, there is an unreported method of attack that can trigger significant memory consumption, potentially impacting the server's performance and availability.

References

https://bugs.squid-cache.org/show_bug.cgi?id=5104
https://github.com/squid-cache/squid/security/advisories/...
https://www.debian.org/security/2021/dsa-4924
vendor-advisory

EPSS Score

8% chance of being exploited in the next 30 days.

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2021-28651 : Denial of Service Vulnerability in Squid Proxy Server by Squid Software