#VU53018 Input validation error in Squid - CVE-2021-28662
Published: May 10, 2021
Vulnerability identifier: #VU53018
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2021-28662
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Squid
Squid
Software vendor:
Squid-cache.org
Squid-cache.org
Description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient input validation when processing HTTP responses. A remote attacker who controls a malicious web page can send specially crafted HTTP response and perform a denial of service attack against the proxy server. The issue trigger is a header which can be expected to exist in HTTP traffic without any malicious intent by the server.
Remediation
Install updates from vendor's website.