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CVE-2023-4583

Browsing Context potentially not cleared when closing Private Window

CVSS 7.5 HIGHEPSS 0.6%CWE-754
Vexday Risk Score
21Low
SSVC decision (CISA)
Track
No exploitation signal → monitor
CVSS 7.5EPSS 0.6%KEV nãoPoC —Nuclei —Metasploit —Patch —
Lifecycle
11 Sep 2023Published on NVD
Recommendation: Monitor — no exploitation signal at the moment.
When checking if the Browsing Context had been discarded in `HttpBaseChannel`, if the load group was not available then it was assumed to have already been discarded which was not always the case for private channels after the private session had ended. This vulnerability affects Firefox < 117, Firefox ESR < 115.2, and Thunderbird < 115.2.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Affected products
Mozilla · FirefoxMozilla · Firefox ESRMozilla · Thunderbird

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References
https://bugzilla.mozilla.org/show_bug.cgi?id=1842030https://www.mozilla.org/security/advisories/mfsa2023-34/https://www.mozilla.org/security/advisories/mfsa2023-36/https://www.mozilla.org/security/advisories/mfsa2023-38/