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Linux Journal: A Rough Year for SSH

Jan 03, 2002, 10:21 (2 Talkback[s])
(Other stories by Jose Nazario)
"Just as 2000 was a rough year for firewalls, with holes blown in both commercial and open-source products, 2001 was a most uncomfortable year for the secure shell, or ssh. Several groups focused their attentions on this cornerstone of the net, and several problems emerged. ssh has emerged from this scrutiny a stronger product.

Not all of these issues affect all ssh users, so it's important to understand the vulnerabilities, their impact, and how to mitigate these risks. In this piece, several of the vulnerabililities found in 2001 are discussed, and some general recommendations for the ssh user are offered.

Briefly, two major vendors of ssh products have emerged, SSH Communications, who originally developed the software, and OpenSSH, who produce an open-source derivative. When referring to the ssh client from SSH Communications, the term Ssh will be used. When referred to the OpenSSH client, the term OpenSSH will be used. This is important as they sometimes do not share security vulnerabilities. SSH1 refers to the version 1 protocol for ssh, and SSH2 refers to the second version of the protocol."

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