Reachable Assertion in Varnish Cache - CVE-2022-38150

Vulnerability identifier: #VU66219

CSH Severity: Medium

CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2022-38150

CWE-ID: CWE-617

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

Varnish Cache
openEuler
Fedora
varnish-modules
varnish
varnish-debuginfo
varnish-devel
varnish-debugsource
varnish-help

Install updates from vendor's website.

Varnish Cache - addressed in versions 7.0.3, 7.1.1
varnish-modules - update to 0.19.0-5.fc36
varnish - addressed in versions 6.6.2-3.fc35, 7.0.3-1.fc36
varnish - update to 7.0.1-6
varnish-debuginfo - update to 7.0.1-6
varnish-devel - update to 7.0.1-6
varnish-debugsource - update to 7.0.1-6
varnish-help - update to 7.0.1-6

• https://docs.varnish-software.com/security/VSV00009

• Denial of service in Varnish Cache
• openEuler 22.03 LTS update for varnish
• Fedora 36 update for varnish
• Fedora 36 update for varnish-modules
• Fedora 35 update for varnish