CVE-2021-23960 — Null Byte Interaction Error (Poison Null Byte) in Mozilla Firefox
Severity
8.8HIGHNVD
EPSS
0.3%
top 46.27%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedFeb 26
Latest updateMay 24
Description
Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash. This vulnerability affects Firefox < 85, Thunderbird < 78.7, and Firefox ESR < 78.7.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9
Affected Packages7 packages
🔴Vulnerability Details
3GHSA▶
GHSA-qvw3-rf6g-2w3x: Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash↗2022-05-24
OSV▶
CVE-2021-23960: Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash↗2021-02-26
CVEList▶
CVE-2021-23960: Performing garbage collection on re-declared JavaScript variables resulted in a user-after-poison, and a potentially exploitable crash↗2021-02-26
📋Vendor Advisories
7Red Hat
▶
Debian▶
CVE-2021-23960: firefox - Performing garbage collection on re-declared JavaScript variables resulted in a ...↗2021