CVE-2017-7836 Privilege escalation in Firefox
Local attackers can escalate privileges by replacing the dynamically loaded libcurl library used by Firefox's pingsender executable on Linux and OS X.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-7836?
CVE-2017-7836 is a high-severity vulnerability in Mozilla Firefox, published on 11 Jun 2018. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
The "pingsender" executable used by the Firefox Health Report dynamically loads a system copy of libcurl, which an attacker could replace. This allows for privilege escalation as the replaced libcurl code will run with Firefox's privileges. Note: This attack requires an attacker have local system access and only affects OS X and Linux. Windows systems are not affected. This vulnerability affects Firefox < 57.
Weakness: CWE-427
Which versions are affected by CVE-2017-7836?
It affects 1 product.
Products include Mozilla Firefox.
How do I fix CVE-2017-7836?
Upgrade to a fixed version.
Is CVE-2017-7836 being exploited?
There is no known exploitation of CVE-2017-7836 in the wild and no public exploit code.
Other vulnerabilities in Mozilla Firefox
Sources
Also known as GHSA-c8qj-chqj-f8j2.