CVE-2013-4434 Information disclosure in n/a
Remote attackers can enumerate valid usernames on Dropbear SSH servers by analyzing timing differences in failed login error messages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2013-4434?
CVE-2013-4434 is a medium-severity 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
Dropbear SSH Server before 2013.59 generates error messages for a failed logon attempt with different time delays depending on whether the user account exists, which allows remote attackers to discover valid usernames.
Weakness: CWE-189
Which versions are affected by CVE-2013-4434?
It affects 1 product.
Products include Dropbear Ssh Project Dropbear Ssh.
How do I fix CVE-2013-4434?
Upgrade to a fixed version.
Is CVE-2013-4434 being exploited?
There is no known exploitation of CVE-2013-4434 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in n/a
Sources
Also known as DEBIAN-CVE-2013-4434, GHSA-7j5m-wjm2-xppv.