CVE-2017-7802 : Vulnerability Insights and Analysis
Learn about CVE-2017-7802, a use-after-free vulnerability affecting Thunderbird, Firefox ESR, and Firefox versions prior to specified versions. Find out the impact, affected systems, exploitation mechanism, and mitigation steps.
A use-after-free vulnerability can occur when manipulating the DOM during the resize event of an image element. This vulnerability affects Thunderbird, Firefox ESR, and Firefox versions prior to specified versions.
Understanding CVE-2017-7802
When making changes to the DOM during the resize event of an image element, a use-after-free vulnerability can be triggered, potentially leading to exploitable crashes.
What is CVE-2017-7802?
This vulnerability arises when elements involved lack strong references and are accessed after being freed, causing potential crashes that can be exploited.
The Impact of CVE-2017-7802
- Affected products: Thunderbird, Firefox ESR, Firefox
- Versions impacted: Thunderbird < 52.3, Firefox ESR < 52.3, Firefox < 55
Technical Details of CVE-2017-7802
Vulnerability Description
- Use-after-free vulnerability during DOM manipulation of image elements
Affected Systems and Versions
- Thunderbird versions prior to 52.3
- Firefox ESR versions prior to 52.3
- Firefox versions prior to 55
Exploitation Mechanism
- Manipulating the DOM during image element resize event
Mitigation and Prevention
Immediate Steps to Take
- Update Thunderbird, Firefox ESR, and Firefox to versions 52.3 and above
- Monitor vendor advisories for patches
Long-Term Security Practices
- Regularly update software to the latest versions
- Implement secure coding practices
Patching and Updates
- Apply patches provided by Mozilla and other relevant vendors