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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

1 year ago

Modified

Modified

1 year 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.

Common Vulnerabilities and Exposures (CVE)