#VU76722 Inefficient regular expression complexity in Hawk - CVE-2022-29167

Vulnerability identifier: #VU76722

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2022-29167

CWE-ID: CWE-1333

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Hawk

Vendor: Mozilla

Description

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

The vulnerability exists due to insufficient input validation when processing untrusted input with a regular expressions within the Hawk.utils.parseHost() function. A remote attacker can pass specially crafted HTTP header to the application and perform regular expression denial of service (ReDos) attack.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

Hawk: 0.6.1 - 9.0.0

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External links
https://github.com/mozilla/hawk/pull/286
https://github.com/mozilla/hawk/security/advisories/GHSA-44pw-h2cw-w3vq

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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.