CVE-2019-11705 : What You Need to Know
Learn about CVE-2019-11705, a vulnerability in Thunderbird's iCal implementation causing a stack buffer overflow. Find out how to mitigate the risk and prevent exploitation.
Thunderbird's inadequate implementation of iCal leads to a stack buffer overflow vulnerability that can be exploited through specific email messages.
Understanding CVE-2019-11705
What is CVE-2019-11705?
A flaw in Thunderbird's implementation of iCal causes a stack buffer overflow in the function icalrecur_add_bydayrules, potentially leading to a crash that can be exploited. Versions prior to 60.7.1 are affected.
The Impact of CVE-2019-11705
This vulnerability allows attackers to trigger a crash in Thunderbird, potentially leading to further exploitation of the system.
Technical Details of CVE-2019-11705
Vulnerability Description
- Thunderbird's inadequate implementation of iCal leads to a stack buffer overflow in icalrecur_add_bydayrules.
Affected Systems and Versions
- Product: Thunderbird
- Vendor: Mozilla
- Versions Affected: Preceding 60.7.1
Exploitation Mechanism
- Attackers can exploit this vulnerability by sending specific email messages to trigger the stack buffer overflow.
Mitigation and Prevention
Immediate Steps to Take
- Update Thunderbird to version 60.7.1 or later to mitigate the vulnerability.
- Avoid opening email attachments or clicking on links from unknown or suspicious sources.
Long-Term Security Practices
- Regularly update Thunderbird and other software to patch known vulnerabilities.
- Educate users on identifying phishing emails and suspicious content.
Patching and Updates
- Stay informed about security advisories from Mozilla and apply patches promptly.