PT-2020-16581 · Mozilla+3 · Firefox+3

Kaizer Soze · Published 2020-11-17 · Updated 2024-12-12 · CVE-2020-26967

Positive Technologies (AI Summary)

CVSS v3.1

6.5

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 83

Description A malicious web page could confuse Firefox Screenshots into interacting with elements other than those that it injected into the page when listening for page changes with a Mutation Observer. This would lead to internal errors and unexpected behavior in the Screenshots code.

Recommendations For versions prior to 83, update to version 83 or later to resolve the issue. As a temporary workaround, consider disabling the use of Mutation Observers in Firefox Screenshots until a patch is available. Restrict access to sensitive elements to minimize the risk of exploitation.

Exploit

Fix

Related Identifiers

ALT-PU-2020-3384

ALT-PU-2021-2725

ALT-PU-2021-2881

ALT-PU-2021-3368

ALT-PU-2021-3369

ALT-PU-2022-1781

ALT-PU-2022-1782

CVE-2020-26967

OPENSUSE-SU-2024:10600-1

OPENSUSE-SU-2024:14572-1

USN-4637-1

USN-4637-2

Affected Products

Alt Linux

Firefox

Linuxmint

Ubuntu

References · 1900

• 🔥 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/hasan-khalil/CVE-2020-6514 · Exploit
• 🔥 https://github.com/HassanAzze/CVE-2020-6514 · Exploit
• 🔥 https://github.com/rojhack/CVE-2020-6514 · Exploit
• 🔥❌ https://github.com/marcinguy/CVE-2020-15999 · Exploit, Deleted
• https://osv.dev/vulnerability/CVE-2020-26967 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-26953 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2020-26967 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2020-26967 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-26951 · Vendor Advisory
• https://ubuntu.com/security/CVE-2020-26961 · Vendor Advisory
• https://bugzilla.mozilla.org/show_bug.cgi?id=1665820 · Vendor Advisory