CVE-2006-4924 Denial of service in n/a
Remote attackers can cause CPU exhaustion and denial of service in OpenSSH servers using the legacy SSH v1 protocol via crafted packets.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2006-4924?
CVE-2006-4924 is a high-severity denial of service vulnerability in OpenSSH, published on 27 Sep 2006. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
sshd in OpenSSH before 4.4, when using the version 1 SSH protocol, allows remote attackers to cause a denial of service (CPU consumption) via an SSH packet that contains duplicate blocks, which is not properly handled by the CRC compensation attack detector.
Weakness: CWE-399
Which versions are affected by CVE-2006-4924?
It affects 1 product.
Products include OpenSSH.
How do I fix CVE-2006-4924?
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-2006-4924 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2006-4924 exists.
Public exploit code: 1 Exploit-DB entry.
Other vulnerabilities in OpenSSH
Sources
Also known as DEBIAN-CVE-2006-4924, GHSA-8x5c-jhv9-65x6.