Security Update for firefox-esr

firefox-esr Updated 02 Oct 2025

Summary

04/08/2016
N/A
Yes i
Unrated
Not published

DLA-585-1: firefox-esr - security update. Affects firefox-esr versions < 45.3.0esr-1~deb7u1. Fixed in 45.3.0esr-1~deb7u1. How to fix ↓

Free scan

Check if this vulnerability affects your application

Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.

Check my app free

No signup required · Results in about 60 seconds

Upload your dependency manifest or SBOM

Drag & drop your file here or

Java Javascript PHP Python Go Rust Ruby Dart C/C++ Elixir CycloneDX SPDX

Upload a supported dependency manifest or SBOM. No installation or source-code access required.

See supported files and SBOM formats
SBOM sbom.json · bom.json · bom.xml · *.spdx.json · *.cdx.json · *.cdx.xml
Java pom.xml · gradle.lockfile · buildscript-gradle.lockfile
Javascript package-lock.json · yarn.lock · pnpm-lock.yaml
PHP composer.lock
Python poetry.lock · requirements.txt · Pipfile.lock
Go go.mod
Rust Cargo.lock
Ruby Gemfile.lock
Dart pubspec.lock
C/C++ conan.lock
Elixir mix.lock
Enter your work email to receive your report link.

Verify your email to view the full report and start 30 days of continuous monitoring. No credit card required.

Sponsored Devnack Mobile apps built by Devnack Design, build and launch iOS and Android apps with a senior product team. From idea to store release Start a project

Background

firefox-esr is a web browser developed by Mozilla. It is an extended support release (ESR) version of Firefox, designed for organizations that require extended support for mass deployments. Firefox-esr is vulnerable to multiple security issues, including memory safety errors, buffer overflows, and implementation errors. These vulnerabilities can lead to the execution of arbitrary code, cross-site scripting, information disclosure, and bypass of the same-origin policy.

Vulnerability Detail

The vulnerabilities found in firefox-esr can be exploited by attackers to execute arbitrary code, perform cross-site scripting attacks, disclose sensitive information, and bypass the same-origin policy. These vulnerabilities stem from memory safety errors, buffer overflows, and implementation errors. If successfully exploited, an attacker can gain unauthorized access to a user's system and perform malicious actions.

How To Fix

Minimum fixed version

45.3.0esr-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 →

Conclusion

Upgrading to the latest version of firefox-esr (45.3.0esr-1~deb7u1 or later) is crucial to address the multiple security vulnerabilities present in earlier versions. It is recommended to update the firefox-esr packages as soon as possible to ensure the security and integrity of systems.

See every vulnerability recorded for firefox-esr →

Share this vulnerability

FAQ

Firefox-esr is an extended support release version of the Mozilla Firefox web browser. It is designed for organizations that require extended support for mass deployments.

The vulnerabilities in firefox-esr include memory safety errors, buffer overflows, and implementation errors. These vulnerabilities can lead to arbitrary code execution, cross-site scripting, information disclosure, and bypass of the same-origin policy.

The vulnerabilities in firefox-esr can be exploited by attackers to execute arbitrary code, perform cross-site scripting attacks, disclose sensitive information, and bypass the same-origin policy. Successful exploitation can result in unauthorized access to a user's system.

To fix the vulnerabilities, it is recommended to upgrade to version 45.3.0esr-1~deb7u1 or later. This version includes patches and fixes for the identified security issues. Users should update their firefox-esr packages as soon as possible.

More information about Debian LTS security advisories, including how to apply updates and frequently asked questions, can be found at https://wiki.debian.org/LTS.

Related vulnerabilities

Recent vulnerabilities recorded for firefox-esr.

How To Fix

Minimum fixed version

45.3.0esr-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 →

Subscribe to Vulert on Telegram
Daily digest of new CVEs, critical and high severity, affected packages and fixes — plus a weekly roundup.
Join the channel →
Help improve this record
Report an issue or send feedback