CVE-2023-25735 : What You Need to Know

This CVE record outlines a security vulnerability identified in Mozilla products, specifically affecting Firefox, Thunderbird, and Firefox ESR versions.

Understanding CVE-2023-25735

This CVE-2023-25735 vulnerability relates to cross-compartment wrappers wrapping a scripted proxy that could lead to objects from other compartments being stored in the main compartment, resulting in a use-after-free issue after unwrapping the proxy. The impacted products include Firefox versions less than 110, Thunderbird versions less than 102.8, and Firefox ESR versions less than 102.8.

What is CVE-2023-25735?

CVE-2023-25735 is a vulnerability in the way cross-compartment wrappers handle scripted proxies, potentially leading to a use-after-free error upon unwrapping the proxy, which could be exploited by attackers.

The Impact of CVE-2023-25735

This vulnerability could be exploited by malicious actors to execute arbitrary code or cause a denial of service by triggering a use-after-free condition, leading to a potential security risk for systems running the affected Mozilla products.

Technical Details of CVE-2023-25735

The following technical aspects of CVE-2023-25735 provide a deeper insight into the nature of this vulnerability.

Vulnerability Description

The vulnerability stems from how objects from different compartments are handled, allowing for a use-after-free scenario when unwrapping scripted proxies within cross-compartment wrappers.

Affected Systems and Versions

Mozilla Firefox versions less than 110 are impacted.
Thunderbird versions less than 102.8 are vulnerable.
Firefox ESR versions less than 102.8 are also affected by this vulnerability.

Exploitation Mechanism

By exploiting the vulnerability in handling cross-compartment wrappers and scripted proxies, attackers could potentially manipulate memory to execute arbitrary code or disrupt the normal operation of the affected software.

Mitigation and Prevention

To safeguard systems from the risks associated with CVE-2023-25735, it is crucial to implement appropriate mitigation strategies and preventive measures.

Immediate Steps to Take

Users are advised to update their Mozilla Firefox, Thunderbird, and Firefox ESR installations to versions that contain patches addressing this vulnerability.
Employ web security best practices and avoid visiting untrusted websites to mitigate the risk of exploit.

Long-Term Security Practices

Regularly update software to the latest versions to ensure that security patches are applied promptly to address known vulnerabilities. Stay informed about security advisories from Mozilla and other software vendors to proactively protect systems from emerging threats.

Patching and Updates

Mozilla has released security updates to address CVE-2023-25735 in Firefox, Thunderbird, and Firefox ESR. Users should apply these patches immediately to secure their systems against potential exploitation.