PT-2021-2995 · Mozilla+4 · Firefox+4

Irvan Kurniawan · Published 2021-04-19 · Updated 2024-12-12 · CVE-2021-23997

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 88

Description The issue is related to unexpected data type conversions that could lead to a use-after-free situation when interacting with the font cache. This could potentially be exploited to run arbitrary code, allowing a remote attacker to execute malicious code.

Recommendations For versions prior to 88, update to version 88 or later to resolve the issue. As a temporary workaround, consider restricting access to the font cache until a patch is available.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-681

CWE-416

Related Identifiers

ALT-PU-2021-1676

ALT-PU-2021-2725

ALT-PU-2021-2881

ALT-PU-2021-3368

ALT-PU-2021-3369

ALT-PU-2022-1781

ALT-PU-2022-1782

BDU:2021-02585

CVE-2021-23997

OESA-2023-1673

OESA-2023-1674

OPENSUSE-SU-2024:10600-1

OPENSUSE-SU-2024:14572-1

USN-4926-1

Affected Products

Alt Linux

Astra Linux

Firefox

Linuxmint

Ubuntu

References · 2192

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/multi/browser/firefox_jit_use_after_free.rb · Exploit
• 🔥 https://github.com/mistymntncop/CVE-2022-26485 · Exploit
• 🔥 https://github.com/aleksejspopovs/cve-2020-16012 · Exploit
• 🔥 https://github.com/R0jhack/CVE-2020-6514 · Exploit
• 🔥 https://github.com/HassanAzze/CVE-2020-6514 · Exploit
• 🔥 https://github.com/rojhack/CVE-2020-6514 · Exploit
• 🔥 https://github.com/hasan-khalil/CVE-2020-6514 · Exploit
• 🔥❌ https://github.com/marcinguy/CVE-2020-15999 · Exploit, Deleted
• https://nvd.nist.gov/vuln/detail/CVE-2022-1529 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-25730 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-23603 · Security Note
• https://ubuntu.com/security/CVE-2021-23995 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2023-28162 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2022-38477 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-26978 · Security Note