CVE-2022-34477

Mozilla Firefox and 2 others: Observable Discrepancy

CVE-2022-34477 is fixed in 5 products on 2 platforms, first by Mozilla Firefox ESR (en-US) 102.0, released June 23, 2022. It is not reported as exploited. Patch Radar priority: High.

HighFixed on 2 platforms

CVSS

7.5

Medium

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0057

47th percentile

The MediaError message property should be consistent to avoid leaking information about cross-origin resources; however for a same-site cross-origin resource, the message could have leaked information enabling XS-Leaks attacks. This vulnerability affects Firefox < 102.

Where it's fixed

Product	Fixed in	Fix	Released
Windows apps
Mozilla Firefox (en-US)	102.0	Mozilla Firefox (en-US) 102.0	Jun 27, 2022
Mozilla Firefox ESR (en-US)	102.0	Mozilla Firefox ESR (en-US) 102.0	Jun 23, 2022
Linux
firefox · Ubuntu 18.04.6 LTS (bionic)	102.0+build2-0ubuntu0.18.04.1	firefox 102.0+build2-0ubuntu0.18.04.1	Jul 4, 2022
firefox · Ubuntu 20.04 LTS (focal)	102.0+build2-0ubuntu0.20.04.1	firefox 102.0+build2-0ubuntu0.20.04.1	Jul 4, 2022
firefox-geckodriver · Ubuntu 18.04.6 LTS (bionic)	102.0+build2-0ubuntu0.18.04.1	firefox-geckodriver 102.0+build2-0ubuntu0.18.04.1	Jul 4, 2022
firefox-geckodriver · Ubuntu 20.04 LTS (focal)	102.0+build2-0ubuntu0.20.04.1	firefox-geckodriver 102.0+build2-0ubuntu0.20.04.1	Jul 4, 2022
firefox-mozsymbols · Ubuntu 18.04.6 LTS (bionic)	102.0+build2-0ubuntu0.18.04.1	firefox-mozsymbols 102.0+build2-0ubuntu0.18.04.1	Jul 4, 2022
firefox-mozsymbols · Ubuntu 20.04 LTS (focal)	102.0+build2-0ubuntu0.20.04.1	firefox-mozsymbols 102.0+build2-0ubuntu0.20.04.1	Jul 4, 2022

Details

Published
July 4, 2022
Weakness
CWE-203: Observable Discrepancy
Vendor advisory
https://nvd.nist.gov/vuln/detail/CVE-2022-34477

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