CVE-2022-29167
Last modified
CVE-2022-29167 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. Hawk is an HTTP authentication scheme providing mechanisms for making authenticated HTTP requests with partial cryptographic verification of the request and response, covering the HTTP method, request URI, host, and optionally the request payload. Hawk used a regular expression to parse `Host` HTTP header (`Hawk.utils.parseHost()`), which was subject to regular expression DoS attack - meaning each added character in the attacker's input increases the computation time exponentially. EPSS estimates a 0.96% chance of exploitation in the next 30 days.
Description
Hawk is an HTTP authentication scheme providing mechanisms for making authenticated HTTP requests with partial cryptographic verification of the request and response, covering the HTTP method, request URI, host, and optionally the request payload. Hawk used a regular expression to parse `Host` HTTP header (`Hawk.utils.parseHost()`), which was subject to regular expression DoS attack - meaning each added character in the attacker's input increases the computation time exponentially. `parseHost()` was patched in `9.0.1` to use built-in `URL` class to parse hostname instead. `Hawk.authenticate()` accepts `options` argument. If that contains `host` and `port`, those would be used instead of a call to `utils.parseHost()`.
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Hawk | < 9.0.1 |
References
- https://github.com/mozilla/hawk/pull/286Patch, Third Party Advisory
- https://github.com/mozilla/hawk/security/advisories/GHSA-44pw-h2cw-w3vqPatch, Third Party Advisory
- https://github.com/mozilla/hawk/pull/286Patch, Third Party Advisory
- https://github.com/mozilla/hawk/security/advisories/GHSA-44pw-h2cw-w3vqPatch, Third Party Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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