CVE-2023-23602

Description

A mishandled security check when creating a WebSocket in a WebWorker caused the Content Security Policy connect-src header to be ignored. This could lead to connections to restricted origins from inside WebWorkers. This vulnerability affects Firefox < 109, Firefox ESR < 102.7, and Thunderbird < 102.7.

CVSS Metrics

• v3.1•MEDIUM•Score: 6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N

EPSS Trends

Current EPSS score: 0.14%• Percentile: 34%

Techniques & Countermeasures

• CWE-754•Improper Check for Unusual or Exceptional Conditions

  The product does not check or incorrectly checks for unusual or exceptional conditions that are not expected to occur frequently during day to day operation of the product.

Affected Systems

• mozilla•firefox

  < 109.0 | ≥ unspecified, < 109

• mozilla•firefox_esr

  < 102.7 | ≥ unspecified, < 102.7

• mozilla•thunderbird

  < 102.7 | ≥ unspecified, < 102.7

References (4)

• https://bugzilla.mozilla.org/show_bug.cgi?id=1800890
• https://www.mozilla.org/security/advisories/mfsa2023-01/
• https://www.mozilla.org/security/advisories/mfsa2023-02/
• https://www.mozilla.org/security/advisories/mfsa2023-03/