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Squid Proxy Cache Security Update Advisory SQUID-2018:5

Information

Severity

Severity

Medium

Family

Family

Denial of Service

CVSSv2 Base

CVSSv2 Base

4.3

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:M/Au:N/C:N/I:N/A:P

Solution Type

Solution Type

Vendor Patch

Created

Created

3 years ago

Modified

Modified

3 years ago

Summary

Squid is prone to a denial of service vulnerability due to a memory leak in the SNMP query rejection code.

Insight

Insight

This problem allows a remote attacker to consume all memory available to the Squid process, causing it to crash. In environments where per-process memory restrictions are not enforced strictly, or configured to large values this may also affect other processes operating on the same machine. Leading to a much worse denial of service situation. This problem is limited to Squid built with SNMP support and receiving SNMP traffic.

Affected Software

Affected Software

Squid versions 3.2.0.10 - 3.5.28, 4.x - 4.3.

Detection Method

Detection Method

Checks if a vulnerable version is present on the target host.

Solution

Solution

Update to version 4.4 or later.

Common Vulnerabilities and Exposures (CVE)