QID 375570

Date Published: 2021-05-18

QID 375570: Squid Multiple Denial Of Service Vulnerability (SQUID-2021:1,SQUID-2021:2,SQUID-2021:3,SQUID-2021:4,SQUID-2021:5)

Squid is a caching proxy for the Web supporting HTTP, HTTPS, FTP, and more. It reduces bandwidth and improves response times by caching and reusing frequently-requested web pages.

Affected Versions:
SQUID-2021:1 : Squid from 2.0 to 4.14 and from 5.0.1 to 5.0.5
SQUID-2021:2 : Squid from 4.0.1 to 4.14 and from 5.0.1 to 5.0.5
SQUID-2021:3 : Squid from 1.0 to 4.14 and from 5.0 to 5.0.5
SQUID-2021:4 : Squid from 2.5.STABLE2 to 2.7.STABLE9 and from 3.0 to 4.1.4 and from 5.0.1 to 5.0.5
SQUID-2021:5 : Squid less than 4.15 and from 5.0 to 5.0.5

QID Detection Logic:
This QID checks for vulnerable version of Squid.

Successful exploitation of these vulnerabilities may allow an attacker to crash squid against all clients using the proxy.

CVSS V3 rated as Critical - 8.6 severity.

CVSS V2 rated as Critical - 8.3 severity.

Solution

Customers are advised to upgrade to a fixed version of later version of Squid to remediate this vulnerability.

Vendor References

SQUID-2021:1 - github.com/squid-cache/squid/security/advisories/GHSA-ch36-9jhx-phm4
SQUID-2021:2 - github.com/squid-cache/squid/security/advisories/GHSA-jjq6-mh2h-g39h
SQUID-2021:3 - github.com/squid-cache/squid/security/advisories/GHSA-m47m-9hvw-7447
SQUID-2021:4 - github.com/squid-cache/squid/security/advisories/GHSA-pxwq-f3qr-w2xf
SQUID-2021:5 - github.com/squid-cache/squid/security/advisories/GHSA-572g-rvwr-6c7f

CVEs related to QID 375570

CVE-2021-28651 | CVE-2021-28652 | CVE-2021-28662 | CVE-2021-31806 | CVE-2021-31807 | CVE-2021-31808 |

Software Advisories

Advisory ID	Software	Component	Link
Squid			squid-cache.org/Download/

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