CVE-2013-4421 Denial of service in n/a
Remote attackers can cause a denial of service in Dropbear SSH Server by sending a compressed packet that consumes excessive memory during decompression.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2013-4421?
CVE-2013-4421 is a medium-severity denial of service vulnerability in n/a, published on 25 Oct 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The buf_decompress function in packet.c in Dropbear SSH Server before 2013.59 allows remote attackers to cause a denial of service (memory consumption) via a compressed packet that has a large size when it is decompressed.
Weakness: CWE-189
Which versions are affected by CVE-2013-4421?
It affects 1 product.
Products include Dropbear Ssh Project Dropbear Ssh.
How do I fix CVE-2013-4421?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2013-4421 being exploited?
There is no known exploitation of CVE-2013-4421 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2013-4421, GHSA-v8r9-3c3f-g75m.