CVE-2003-0386 Auth bypass in n/a
Remote attackers can bypass SSH host access restrictions by spoofing reverse DNS when VerifyReverseMapping is disabled.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2003-0386?
CVE-2003-0386 is a high-severity authentication bypass vulnerability in OpenSSH, published on 10 Jun 2003. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OpenSSH 3.6.1 and earlier, when restricting host access by numeric IP addresses and with VerifyReverseMapping disabled, allows remote attackers to bypass "from=" and "user@host" address restrictions by connecting to a host from a system whose reverse DNS hostname contains the numeric IP address.
Which versions are affected by CVE-2003-0386?
It affects 1 product.
Products include OpenSSH.
How do I fix CVE-2003-0386?
Upgrade to a fixed version.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2003-0386 being exploited?
There is no known exploitation of CVE-2003-0386 in the wild and no public exploit code.
Other vulnerabilities in OpenSSH
Sources
Also known as DEBIAN-CVE-2003-0386, GHSA-ph8j-5f3x-v435.