CVE-2019-11751 Path traversal in Firefox
Attackers can write log files to arbitrary locations like the Windows Startup folder via malicious links, potentially achieving code execution.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2019-11751?
CVE-2019-11751 is a high-severity path traversal vulnerability in Mozilla Firefox, published on 27 Sep 2019. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Logging-related command line parameters are not properly sanitized when Firefox is launched by another program, such as when a user clicks on malicious links in a chat application. This can be used to write a log file to an arbitrary location such as the Windows 'Startup' folder. <br>*Note: this issue only affects Firefox on Windows operating systems.*. This vulnerability affects Firefox < 69 and Firefox ESR < 68.1.
Weakness: CWE-88
Which versions are affected by CVE-2019-11751?
It affects 2 products.
Products include Mozilla Firefox, Mozilla Firefox Esr.
How do I fix CVE-2019-11751?
Upgrade to a fixed version.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2019-11751 being exploited?
There is no known exploitation of CVE-2019-11751 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-mm6c-gvcp-4p56, UBUNTU-CVE-2019-11751.