CVE-2019-11759 : Exploit Details and Defense Strategies
Learn about CVE-2019-11759, a Mozilla vulnerability allowing attackers to execute code or crash systems. Find affected versions and mitigation steps here.
A vulnerability in Mozilla products could allow an attacker to execute arbitrary code or cause a system crash.
Understanding CVE-2019-11759
What is CVE-2019-11759?
This CVE involves a stack buffer overflow in HKDF output, impacting Firefox, Thunderbird, and Firefox ESR versions before specific releases.
The Impact of CVE-2019-11759
The vulnerability could enable attackers to write beyond buffer limits, potentially leading to code execution or system crashes.
Technical Details of CVE-2019-11759
Vulnerability Description
An attacker could exploit a buffer stored on the stack, causing HMAC output to be written beyond its intended limits.
Affected Systems and Versions
- Firefox versions before 70
- Thunderbird versions before 68.2
- Firefox ESR versions before 68.2
Exploitation Mechanism
The vulnerability allows attackers to manipulate the buffer to execute arbitrary code or induce system crashes.
Mitigation and Prevention
Immediate Steps to Take
- Update affected products to versions 70 (Firefox), 68.2 (Thunderbird), and 68.2 (Firefox ESR)
- Monitor for any signs of unauthorized access or system instability
Long-Term Security Practices
- Regularly update software to patch known vulnerabilities
- Implement network security measures to prevent unauthorized access
Patching and Updates
Apply patches provided by Mozilla to address the vulnerability.