CVE-2022-28281
Published: 22 December 2022
Summary
CVE-2022-28281 is a high-severity Out-of-bounds Write (CWE-787) vulnerability in Mozilla Firefox. Its CVSS base score is 8.8 (High).
Operationally, ranked in the top 5.1% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
CVE-2022-28281 is an out-of-bounds write vulnerability that affects the WebAuthN implementation in Mozilla Firefox, Firefox ESR, and Thunderbird. When a compromised content process sends an unexpected number of WebAuthN Extensions in a Register command to the parent process, memory corruption occurs that can lead to a potentially exploitable crash. The flaw is tracked under CWE-787 and carries a CVSS 3.1 score of 8.8.
An attacker who has already gained control of a content process can trigger the flaw by issuing a malformed WebAuthN Register command, resulting in memory corruption that may be leveraged for further exploitation with impacts on confidentiality, integrity, and availability.
Mozilla addressed the issue in advisories MFSA2022-13, MFSA2022-14, and MFSA2022-15 by releasing fixed versions Firefox 99, Firefox ESR 91.8, and Thunderbird 91.8. The associated EPSS score has remained flat at a peak of 0.1574 with no material rise after disclosure.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2022-32733
Vulnerability details
If a compromised content process sent an unexpected number of WebAuthN Extensions in a Register command to the parent process, an out of bounds write would have occurred leading to memory corruption and a potentially exploitable crash. This vulnerability affects…
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Thunderbird < 91.8, Firefox < 99, and Firefox ESR < 91.8.
- CWE(s)
Related Threats
No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.
Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Out-of-bounds writes that corrupt control flow or inject shellcode are rendered non-executable by the same memory protections.