CVE-2017-2891 Use after free in Mongoose
A use-after-free in Cesanta Mongoose allows remote code execution via a crafted HTTP POST request to a CGI target.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2017-2891?
CVE-2017-2891 is a critical use after free vulnerability in Cesanta Mongoose, published on 7 Nov 2017. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
An exploitable use-after-free vulnerability exists in the HTTP server implementation of Cesanta Mongoose 6.8. An ordinary HTTP POST request with a CGI target can cause a reuse of previously freed pointer potentially resulting in remote code execution. An attacker needs to send this HTTP request over the network to trigger this vulnerability.
Weakness: CWE-416
Which versions are affected by CVE-2017-2891?
It affects 1 product.
Products include Cesanta Mongoose.
How do I fix CVE-2017-2891?
Upgrade to a fixed version.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2017-2891 being exploited?
There is no known exploitation of CVE-2017-2891 in the wild and no public exploit code.
Other vulnerabilities in Cesanta Mongoose
Sources
Also known as DEBIAN-CVE-2017-2891, GHSA-rwjm-353c-64rx.