Resource exhaustion in Mozilla Hawk
CVE-2022-29167
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()`.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.011 (64.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 64th percentile — 64.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.011 · newest: 0.011 · change: +0.000
Affected products
- Mozilla Hawk — versions < 9.0.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/mozilla/hawk/security/advisories/GHSA-44pw-h2cw-w3vq (Patch, Third Party Advisory)
- github.com/mozilla/hawk/pull/286 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-29167?
- CVE-2022-29167 is a high-severity vulnerability in Mozilla Hawk, classified under Uncontrolled Resource Consumption. CVSS score: 7.4/10. Published 2022-05-05.
- How severe is CVE-2022-29167?
- High severity. CVSS v3 base score is 7.4 out of 10.
- Is CVE-2022-29167 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.