CVE-2022-45406

Description

If an out-of-memory condition occurred when creating a JavaScript global, a JavaScript realm may be deleted while references to it lived on in a BaseShape. This could lead to a use-after-free causing a potentially exploitable crash. This vulnerability affects Firefox ESR < 102.5, Thunderbird < 102.5, and Firefox < 107.

CVSS Metrics

• v3.1•CRITICAL•Score: 9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 1.06%• Percentile: 61%

Techniques & Countermeasures

• CWE-416•Use After Free

  The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Affected Systems

• mozilla•firefox

  ≥ unspecified, < 107 | < 107.0

• mozilla•firefox_esr

  ≥ unspecified, < 102.5 | < 102.5

• mozilla•thunderbird

  ≥ unspecified, < 102.5 | < 102.5

References (4)

• https://www.mozilla.org/security/advisories/mfsa2022-47/
• https://www.mozilla.org/security/advisories/mfsa2022-49/
• https://www.mozilla.org/security/advisories/mfsa2022-48/
• https://bugzilla.mozilla.org/show_bug.cgi?id=1791975