CVE-2022-34472

Severity: medium (CVSS 4.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2022-12-22 · updated 2026-06-17
Weakness: CWE-703

Description

If there was a PAC URL set and the server that hosts the PAC was not reachable, OCSP requests would have been blocked, resulting in incorrect error pages being shown. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

Affected products

Mozilla Firefox: before 102.0 — fixed in 102.0
Mozilla Firefox ESR: before 91.11 — fixed in 91.11
Mozilla Thunderbird: before 91.11 — fixed in 91.11

How to fix

Upgrade to a fixed version: Mozilla Firefox 102.0; Mozilla Firefox ESR 91.11; Mozilla Thunderbird 91.11. Check the vendor advisory for mitigations.

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1770123
https://www.mozilla.org/security/advisories/mfsa2022-24/
https://www.mozilla.org/security/advisories/mfsa2022-25/
https://www.mozilla.org/security/advisories/mfsa2022-26/
https://bugzilla.mozilla.org/show_bug.cgi?id=1770123
https://www.mozilla.org/security/advisories/mfsa2022-24/
https://www.mozilla.org/security/advisories/mfsa2022-25/
https://www.mozilla.org/security/advisories/mfsa2022-26/

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