Security Update for firefox-esr

firefox-esr Updated 02 Oct 2025

Summary

25/01/2018
N/A
Yes i
Unrated
Not published

DLA-1256-1: firefox-esr - security update. Affects firefox-esr versions < 52.6.0esr-1~deb7u1. Fixed in 52.6.0esr-1~deb7u1. How to fix ↓

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Background

firefox-esr is a web browser developed by Mozilla. It is a long-term support (LTS) version of Firefox, designed for stability and security. It is widely used by individuals and organizations for browsing the internet.

Vulnerability Detail

Multiple security issues have been discovered in firefox-esr. These include memory safety errors, use-after-frees, and other implementation errors. These vulnerabilities could potentially allow an attacker to execute arbitrary code or cause a denial of service.

How To Fix

Minimum fixed version

52.6.0esr-1~deb7u1

This is the first release that contains the fix.

sudo apt-get install --only-upgrade firefox-esr

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Conclusion

Multiple security vulnerabilities have been discovered in firefox-esr. To ensure the security of your system, it is crucial to upgrade to version 52.6.0esr-1~deb7u1 or later. For further support on vulnerability remediation, you can contact DevNack.com.

See every vulnerability recorded for firefox-esr →

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FAQ

Firefox Extended Support Release (ESR) is a version of Firefox that is designed for organizations and individuals who need extended support for their web browsing needs.

These vulnerabilities could allow an attacker to execute arbitrary code on a user's system or cause a denial of service, potentially leading to unauthorized access or data loss.

You can use Vulert's playground (https://vulert.com/scanner) to check if your firefox-esr version is affected by these vulnerabilities. Simply upload your package-lock.json file and Vulert will provide real-time alerts for any open-source vulnerabilities.

At the moment, there are no specific workarounds mentioned for these vulnerabilities. It is recommended to upgrade to the fixed version of firefox-esr.

You can find more information about Debian LTS security advisories, including how to apply updates and frequently asked questions, on the Debian LTS wiki: https://wiki.debian.org/LTS

Related vulnerabilities

Recent vulnerabilities recorded for firefox-esr.

How To Fix

Minimum fixed version

52.6.0esr-1~deb7u1

This is the first release that contains the fix.

sudo apt-get install --only-upgrade firefox-esr

Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →

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