Tavis Ormandy has reported a vulnerability in OpenSSH, which can be exploited by malicious people to cause a DoS (Denial of Service).
The vulnerability is caused due to an error within the handling of multiple identical blocks in a ssh packet. If ssh protocol 1 is enabled, this can be exploited to cause a DoS due to CPU consumption by sending specially crafted ssh packets.
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Subject: OpenSSH Identical Blocks Denial of Service Vulnerability
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