Input validation error in Squid - CVE-2021-31806
Published: May 10, 2021 / Updated: October 21, 2021
Vulnerability identifier: #VU53020
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:A/U:Green
CVE-ID: CVE-2021-31806
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Squid-cache.org
Affected software:
Squid
Squid
Detailed vulnerability description
The vulnerability allows a remote client to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input when performing HTTP Range requests. A remote proxy client can send specially crafted HTTP request via the proxy server and perform a denial of service (DoS) attack.
How to mitigate CVE-2021-31806
Install updates from vendor's website.