XSLT Parameter Removal Vulnerability in Mozilla Firefox and Thunderbird
CVE-2022-26485

8.8HIGH

Key Information:

Vendor
Mozilla
Status
Firefox
Firefox Esr
Firefox For Android
Thunderbird
Vendor
CVE Published:
22 December 2022

Badges

👾 Exploit Exists🟡 Public PoC🦅 CISA Reported

Summary

A flaw in Mozilla Firefox and Thunderbird arises from improper handling of XSLT parameters, which could allow for an exploitable use-after-free condition. Various versions of Firefox, including those on Android, as well as Thunderbirds prior to specified versions, are susceptible. Reports indicate active exploitation of this vulnerability, emphasizing the importance of timely updates and security measures.

CISA Reported

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace

The CISA's recommendation is: Apply updates per vendor instructions.

Affected Version(s)

Firefox < 97.0.2

Firefox ESR < 91.6.1

Firefox for Android < 97.3.0

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2022-26485
Created by mistymntncop

References

https://www.mozilla.org/security/advisories/mfsa2022-09/
https://bugzilla.mozilla.org/show_bug.cgi?id=1758062

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
Required
Scope:
Unchanged

Timeline

  • 🟡

    Public PoC available

  • Vulnerability published

  • 👾

    Exploit known to exist

  • 🦅

    CISA Reported

  • Vulnerability Reserved

.