Vulnerability · Published Apr 16, 2024 · Assigned by mozilla
CVE-2024-3855
Medium 6.5
In plain English
A medium-severity out-of-bounds read 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 0.4% (higher than 34% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.4%top 65.8% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
In certain cases the JIT incorrectly optimized MSubstr operations, which led to out-of-bounds reads. This vulnerability affects Firefox < 125.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2024-3855 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2024-3855 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2024-3855 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2024-3855 |
Affected products (as reported)
Weakness: CWE-125 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H