CVE-2021-23997 — Incorrect Conversion between Numeric Types in Mozilla Firefox

CWE-681 — Incorrect Conversion between Numeric Types7 documents6 sources
Severity
8.8HIGHNVD
EPSS
0.2%
top 57.46%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla FirefoxDebian Firefox
Timeline
PublishedJun 24
Latest updateMay 24

Description

Due to unexpected data type conversions, a use-after-free could have occurred when interacting with the font cache. We presume that with enough effort this could have been exploited to run arbitrary code. This vulnerability affects Firefox < 88.

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 Packages5 packages

▶debiandebian/firefox< firefox 88.0-1 (sid)
▶CVEListV5mozilla/firefoxunspecified — 88
▶NVDmozilla/firefox< 88.0
▶Ubuntumozilla/firefox< 88.0+build2-0ubuntu0.16.04.1+2
▶mozillamozilla/firefox

🔴Vulnerability Details

3
GHSA
GHSA-v254-2gqm-j372: Due to unexpected data type conversions, a use-after-free could have occurred when interacting with the font cache↗2022-05-24
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OSV
firefox vulnerabilities↗2021-04-26
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OSV
CVE-2021-23997: Due to unexpected data type conversions, a use-after-free could have occurred when interacting with the font cache↗2021-04-19
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📋Vendor Advisories

3
Ubuntu
Firefox vulnerabilities↗2021-04-26
▶
Debian
CVE-2021-23997: firefox - Due to unexpected data type conversions, a use-after-free could have occurred wh...↗2021
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Mozilla
Mozilla Foundation Security Advisory 2021-16: CVE-2021-23997↗
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