TI-2024-06980 Aliases CVE-2024-7531 GHSA-3jj9-9269-99m2

Time-of-check time-of-use race condition in Mozilla Firefox

LOW 29CWE-367Published 2024-08-06 · Updated 2025-03-19

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 1 fixed, 4 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00437 38th percentileScored 2026-11-07

Fix Partial Firefox (Mozilla): 129Firefox ESR (Mozilla): 115.14, 128.1Red Hat: 1 advisoryRed Hat: 1 fixed, 4 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Mozilla	Firefox	before 129	129	Patch available	CNA
Mozilla	Firefox ESR	before 115.14	115.14	Patch available	CNA
Mozilla	Firefox ESR	before 128.1	128.1	Patch available	CNA

Firefox VendorMozilla Affected before 129 Fixed in 129 Patch available CNA
Firefox ESR VendorMozilla Affected before 115.14 Fixed in 115.14 Patch available CNA
Firefox ESR VendorMozilla Affected before 128.1 Fixed in 128.1 Patch available CNA

CPE configurations NVD · 3

CPE	Versions	Role	Vendor
cpe:2.3:a:mozilla:firefox::::::::	before 129.0	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_esr::::::::	before 115.14.0	Vulnerable	Mozilla
cpe:2.3:a:mozilla:firefox_esr:128.0:::::::*	128.0	Vulnerable	Mozilla

cpe:2.3:a:mozilla:firefox:*:*:*:*:*:*:*:* Versions before 129.0 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_esr:*:*:*:*:*:*:*:* Versions before 115.14.0 Vulnerable ·Mozilla
cpe:2.3:a:mozilla:firefox_esr:128.0:*:*:*:*:*:*:* Versions 128.0 Vulnerable ·Mozilla

Remediation

Fix · CNA Firefox (Mozilla) Fixed in 129
Fix · CNA Firefox ESR (Mozilla) Fixed in 115.14
Fix · CNA Firefox ESR (Mozilla) Fixed in 128.1

Red Hat 1 advisory

RHSA-2024:6839 Released 2024-09-19 · Red Hat rating Important
firefox update
- Red Hat Enterprise Linux AppStream AUS (v. 8.2) firefox-128.2.0-1.el8_2

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

Release · 2024-08-06
Mozilla Firefox 129
14 records Highest priority Priority MEDIUM 9 MEDIUM, 5 LOW
Other records, highest priority first
- TI-2024-06970 Improper handling of exceptional conditions in Mozilla FirefoxPriority MEDIUM 50
- TI-2024-06979 Use after free in Mozilla FirefoxPriority MEDIUM 49
- TI-2024-06977 Use after free in Mozilla FirefoxPriority MEDIUM 49
Show all 14 records →
Release · 2024-08-06
Mozilla Firefox ESR 128.1
12 records Highest priority Priority MEDIUM 8 MEDIUM, 4 LOW
Other records, highest priority first
- TI-2024-06970 Improper handling of exceptional conditions in Mozilla FirefoxPriority MEDIUM 50
- TI-2024-06977 Use after free in Mozilla FirefoxPriority MEDIUM 49
- TI-2024-06974 Improper access control in Mozilla FirefoxPriority MEDIUM 46
Show all 12 records →

Show 1 more group

Release · 2024-08-06
Mozilla Firefox ESR 115.14
9 records Highest priority Priority MEDIUM 6 MEDIUM, 3 LOW
Other records, highest priority first
- TI-2024-06970 Improper handling of exceptional conditions in Mozilla FirefoxPriority MEDIUM 50
- TI-2024-06974 Improper access control in Mozilla FirefoxPriority MEDIUM 46
- TI-2024-06971 Out-of-bounds read in Mozilla FirefoxPriority MEDIUM 46
Show all 9 records →

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 7	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 8	Affected	No fix yet
Red Hat Enterprise Linux 9	Affected	No fix yet
Red Hat Enterprise Linux AppStream AUS (v. 8.2)	Fixed	RHSA-2024:6839

Not affected: 4 products

Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2024-7531
2026-10-03 Alias added: GHSA-3jj9-9269-99m2

References

Advisory 3

Other 1

https://bugzilla.mozilla.org/show_bug.cgi?id=1905691

TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8

See all 3444 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences