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Squid 4.0.1 < 4.14, 5.0.1 < 5.0.5 DoS Vulnerability (SQUID-2021:2)
Information
Severity
Severity
High
Family
Family
Denial of Service
CVSSv2 Base
CVSSv2 Base
7.8
CVSSv2 Vector
CVSSv2 Vector
AV:N/AC:L/Au:N/C:N/I:N/A:C
Solution Type
Solution Type
Vendor Patch
Created
Created
2 years ago
Modified
Modified
2 years ago
Summary
Squid is prone to a denial of service (DoS) vulnerability.
Insight
Insight
Due to an input validation bug Squid is vulnerable to a DoS against all clients using the proxy. This problem allows a remote server to perform a DoS when delivering HTTP Response messages. The issue trigger is a header which can be expected to exist in HTTP traffic without any malicious intent by the server.
Affected Software
Affected Software
Squid version 4.0.1 through 4.14 and 5.0.1 through 5.0.5.
Detection Method
Detection Method
Checks if a vulnerable version is present on the target host.
Solution
Solution
Update to version 4.15, 5.0.6 or later.