CVE-2021-38504 — Use After Free in Mozilla Firefox
Severity
8.8HIGHNVD
OSV10.0
EPSS
1.3%
top 20.25%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
Timeline
PublishedDec 8
Latest updateJan 21
Description
When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory corruption and a potentially exploitable crash. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
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 Packages9 packages
Also affects: Debian Linux 10.0, 11.0, 9.0
🔴Vulnerability Details
5GHSA▶
GHSA-53f7-m98p-5ggp: When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory cor↗2021-12-09
OSV▶
CVE-2021-38504: When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory cor↗2021-12-08
CVEList▶
CVE-2021-38504: When interacting with an HTML input element's file picker dialog with webkitdirectory set, a use-after-free could have resulted, leading to memory cor↗2021-12-08
📋Vendor Advisories
8Debian▶
CVE-2021-38504: firefox - When interacting with an HTML input element's file picker dialog with webkitdire...↗2021