PT-2021-8092 · Mozilla+2 · Firefox Esr+3

Cristiano Giuffrida + 3 · Published 2021-02-16 · Updated 2023-09-22 · CVE-2021-29955

Positive Technologies (AI Summary)

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:N/A:N

Name of the Vulnerable Software and Affected Versions Firefox ESR versions prior to 78.9 Firefox versions prior to 87

Description The issue is related to insufficient neutralization of special elements in a request, which may allow a remote attacker to access confidential data. It is also described as a transient execution vulnerability, specifically Floating Point Value Injection (FPVI), allowing an attacker to leak arbitrary memory addresses and potentially enabling JIT type confusion attacks.

Recommendations For Firefox ESR versions prior to 78.9, update to version 78.9 or later. For Firefox versions prior to 87, update to version 87 or later.

Exploit

Fix

Special Elements Injection

Weakness Enumeration

CWE-74

Related Identifiers

ALT-PU-2021-1543

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:2024-06960

CVE-2021-29955

DLA-2607-1

DSA-4874-1

OESA-2023-1673

OESA-2023-1674

Affected Products

Alt Linux

Astra Linux

Firefox

Firefox Esr

References · 320

• 🔥 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/rojhack/CVE-2020-6514 · Exploit
• 🔥 https://github.com/hasan-khalil/CVE-2020-6514 · Exploit
• 🔥 https://github.com/R0jhack/CVE-2020-6514 · Exploit
• 🔥 https://github.com/HassanAzze/CVE-2020-6514 · Exploit
• 🔥❌ https://github.com/marcinguy/CVE-2020-15999 · Exploit, Deleted
• https://osv.dev/vulnerability/OESA-2023-1673 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2022-31744 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-25729 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-23601 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2020-26960 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2021-38491 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-32215 · Security Note