Vulnerability identifier: #VU29389

Vulnerability risk: Medium

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-14059

CWE-ID: CWE-399

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Squid
Server applications / IDS/IPS systems, Firewalls and proxy servers

Vendor: Squid-cache.org

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to incorrect synchronization when processing objects in an SMP cache. A remote client trigger a Squid worker assertion and perform a denial of service (DoS) attack.

This attack is limited to SMP Squids using shared memory cache and/or an SMP rock disk cache.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Squid: 5.0.1 - 5.0.2

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External links
http://github.com/squid-cache/squid/security/advisories/GHSA-w7pw-2m4p-58hr

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.