Vulnerability identifier: #VU66219

Vulnerability risk: Medium

CVSSv3.1: 5.2 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2022-38150

CWE-ID: CWE-617

Exploitation vector: Network

Exploit availability: No

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

Vendor: Varnish Software

Description

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

The vulnerability exists due to a reachable assertion when processing HTTP/1 responses from configured backends. A remote attacker with ability to influence server response can pass specially crafted reason phrase of the backend response status line and perform a denial of service (DoS) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Varnish Cache: 7.1.0, 7.0.0 - 7.0.2

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External links
http://docs.varnish-software.com/security/VSV00009

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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