Vulnerability · Published Aug 6, 2024 · Assigned by mozilla
CVE-2024-7521
Critical 9.8
In plain English
A critical-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 50.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
Incomplete WebAssembly exception handing could have led to a use-after-free. This vulnerability affects Firefox < 129, Firefox ESR < 115.14, Firefox ESR < 128.1, Thunderbird < 128.1, and Thunderbird < 115.14.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | firefox | 115.14.0-2.el8_10.alma.1 | ALSA-2024:5391 |
| AlmaLinux:9 | firefox | 115.14.0-2.el9_4.alma.1 | ALSA-2024:5322 |
| AlmaLinux:9 | firefox-x11 | 115.14.0-2.el9_4.alma.1 | ALSA-2024:5322 |
| AlmaLinux:8 | thunderbird | 115.14.0-1.el8_10.alma.1 | ALSA-2024:5402 |
| AlmaLinux:9 | thunderbird | 115.14.0-1.el9_4.alma.1 | ALSA-2024:5392 |
| Debian:12 | firefox-esr | 115.14.0esr-1~deb12u1 | DEBIAN-CVE-2024-7521 |
| Debian:12 | firefox-esr | 115.14.0esr-1~deb12u1 | DSA-5740-1 |
| Debian:13 | firefox-esr | 115.14.0esr-1 | DEBIAN-CVE-2024-7521 |
| Debian:14 | firefox-esr | 115.14.0esr-1 | DEBIAN-CVE-2024-7521 |
| Debian:12 | thunderbird | 1:115.14.0-1~deb12u1 | DEBIAN-CVE-2024-7521 |
| Debian:12 | thunderbird | 1:115.14.0-1~deb12u1 | DSA-5744-1 |
| Debian:13 | thunderbird | 1:128.1.0esr-1 | DEBIAN-CVE-2024-7521 |
| Debian:14 | thunderbird | 1:128.1.0esr-1 | DEBIAN-CVE-2024-7521 |
| Rocky Linux:8 | firefox | 0:115.14.0-2.el8_10 | RLSA-2024:5391 |
| Rocky Linux:8 | thunderbird | 0:115.14.0-1.el8_10 | RLSA-2024:5402 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2024-7521 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2024-7521 |
| Ubuntu:24.04:LTS | mozjs115 | no fix listed | UBUNTU-CVE-2024-7521 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2024-7521 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2024-7521 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.15.0+build1-0ubuntu0.22.04.1 | UBUNTU-CVE-2024-7521 |
| Ubuntu:22.04:LTS | thunderbird | 1:115.15.0+build1-0ubuntu0.22.04.1 | USN-6995-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | unspecified – before 129 |
| Mozilla | Firefox ESR | unspecified – before 115.14 |
| Mozilla | Firefox ESR | unspecified – before 128.1 |
| Mozilla | Thunderbird | unspecified – before 128.1 |
| Mozilla | Thunderbird | unspecified – before 115.14 |
Weakness: CWE-755 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1904644
- https://www.mozilla.org/security/advisories/mfsa2024-33/
- https://www.mozilla.org/security/advisories/mfsa2024-34/
- https://www.mozilla.org/security/advisories/mfsa2024-35/
- https://www.mozilla.org/security/advisories/mfsa2024-37/
- https://www.mozilla.org/security/advisories/mfsa2024-38/