🛡️ CVE-2024-7531
🟡 CVSS 6.5 — Medium ✅ No Known Exploit CWE-367 NVD
6.5
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Calling `PK11_Encrypt()` in NSS using CKM_CHACHA20 and the same buffer for input and output can result in plaintext on an Intel Sandy Bridge processor. In Firefox this only affects the QUIC header protection feature when the connection is using the ChaCha20-Poly1305 cipher suite. The most likely outcome is connection failure, but if the connection persists despite the high packet loss it could be possible for a network observer to identify packets as coming from the same source despite a network path change. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, and Firefox ESR < 128.1.

Details

Severity MEDIUM
CVSS Score 6.5
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE CWE-367
Public Exploit ✅ No
Source NVD
Published 2024-08-06
Updated 2026-06-02
Modified 2025-03-19
Fix URL N/A

Affected Packages

Software From version Fixed in
firefox — 129.0
firefox-esr — —

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