When encoding data from an <code>inputStream</code> in <code>xpcom</code> the size of the input being encoded was not correctly calculated potentially leading to an out of bounds memory write. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
Fix
Patch, vendor advisory and mitigation references on NVD 6
- https://www.mozilla.org/security/advisories/mfsa2023-05/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-06/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-07/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-05/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-06/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-07/ Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 8.8 · mozillaNVD modified 2026-10-24 13:10
Affected (CPE criteria) 3
cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:*cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:*cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
References 9
- https://bugzilla.mozilla.org/show_bug.cgi?id=1804564 Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2023-05/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-06/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-07/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1804564 Issue Tracking, Permissions Required
- https://www.mozilla.org/security/advisories/mfsa2023-05/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-06/ Vendor Advisory
- https://www.mozilla.org/security/advisories/mfsa2023-07/ Vendor Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=1804564 Issue Tracking, Permissions Required