6.5

CVE-2024-7531: mozilla firefox

CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2024-7531DEBIAN-CVE-2024-7531CGA-5jr4-qp6h-42rv
Published 06-08-2024Last modified 19-03-2025
Open JSON

Vulnerability summary

CVE-2024-7531 is a medium (CVSS 6.5) vulnerability in mozilla firefox. EPSS estimates a 0.44% chance of exploitation in the next 30 days, higher than 36.6% of scored vulnerabilities.

Overall risk
26/100
0100
Medium · default modelHow is this calculated?
CVSS score
6.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.44%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 8 · Related 8
DSA-5740-1MGASA-2024-0325MGASA-2024-0332OPENSUSE-SU-2024:14260-1OPENSUSE-SU-2024:14572-1SUSE-SU-2024:2876-1

Timeline

  1. 06-08-2024
    PublishedVulnerability first disclosed.
  2. 19-03-2025
    Last modifiedVulnerability information updated.

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.

CVSS metrics

6 scores · 6 sources · 1 version

EPSS trend

Probability

0.44%

Chance of exploitation in the next 30 days

Percentile

37%

Versus all other CVEs

30-day change

0.00 pp

From 0.44% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.44%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu8 products
  • firefox< 129.0.1+build1-0ubuntu0.20.04.1
  • mozjs102All versions (No fix recorded)
  • mozjs115All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
Chainguard2 products
  • firefox< 129.0.2-r0
  • firefox-esr< 128.1.0-r0
Debian2 products
  • firefox-esr< 115.14.0esr-1~deb12u1 | < 115.14.0esr-1
  • nssAll versions (No fix recorded) | < 2:3.103-1
Mozilla2 products
  • firefox≥ unspecified, < 129 | < 129.0
  • firefox_esr≥ unspecified, < 115.14 | ≥ unspecified, < 128.1 | < 115.14.0 | 128.0
Wolfi1 product
  • firefox< 129.0.2-r0

5 vendors · 15 products

References

10 links