SCO Security Advisory SCOSA-2008.2 - sshd in OpenSSH versions before 4.4, when using the version 1 SSH protocol, could allow a remote attacker to cause a denial of service. It certainly is nice to have SCO bring this to light for their consumers two years after the fact.
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HP Security Bulletin - A potential security vulnerability has been identified with HP-UX running HP-UX Secure Shell. The vulnerability could be remotely exploited to allow a remote unauthorized user to create a denial of service.
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Debian Security Advisory 1212-1 - Two denial of service vulnerabilities have been found in the OpenSSH server. The sshd support for ssh protocol version 1 does not properly handle duplicate incoming blocks. This could allow a remote attacker to cause sshd to consume significant CPU resources leading to a denial of service. A signal handler race condition could potentially allow a remote attacker to crash sshd and could theoretically lead to the ability to execute arbitrary code.
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