9.8

CVE-2024-5699: mozilla firefox Improper Handling of Case Sensitivity

CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2024-5699CGA-h863-3pmv-7r68CGA-pfp4-687q-c3mm
Published 11-06-2024Last modified 12-08-2024
Open JSON

Vulnerability summary

CVE-2024-5699 is a critical (CVSS 9.8) Improper Handling of Case Sensitivity vulnerability in mozilla firefox. EPSS estimates a 0.77% chance of exploitation in the next 30 days, higher than 55.1% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.77%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1reference

Advisory lineage

Upstream 0 · Downstream 3 · Related 5
OPENSUSE-SU-2024:14044-1OPENSUSE-SU-2024:14572-1USN-6862-1CGA-GC3W-RGV9-H6M4CGA-J89C-6JHP-9V9R

Timeline

  1. 11-06-2024
    PublishedVulnerability first disclosed.
  2. 12-08-2024
    Last modifiedVulnerability information updated.

Description

In violation of spec, cookie prefixes such as `__Secure` were being ignored if they were not correctly capitalized - by spec they should be checked with a case-insensitive comparison. This could have resulted in the browser not correctly honoring the behaviors specified by the prefix. This vulnerability affects Firefox < 127.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.77%

Chance of exploitation in the next 30 days

Percentile

55%

Versus all other CVEs

30-day change

0.00 pp

From 0.77% on 21-09-2026

21-09-202621-10-2026
EPSS score
0.77%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • referenceUnverified

    Exploit Reference (bugzilla.mozilla.org)

    Maturity: unknown

Weaknesses

CWE · root cause

Affected systems

Ubuntu7 products
  • firefox< 127.0.2+build1-0ubuntu0.20.04.1
  • mozjs102All versions (No fix recorded)
  • mozjs38All versions (No fix recorded)
  • mozjs52All versions (No fix recorded)
  • mozjs68All versions (No fix recorded)
Chainguard2 products
  • firefox< 127.0.2-r0
  • firefox-esr< 127-r0
Mozilla1 product
  • firefox≥ unspecified, < 127 | < 127.0
Wolfi1 product
  • firefox< 127.0.2-r0

4 vendors · 11 products

References

6 links