Date: Wed, 26 Mar 2014 14:24:04 +0100
From: Thijs Kinkhorst <thijs@...ian.org>
Subject: CVE request: openssh client does not check SSHFP if server offers certificate
A vulnerability in OpenSSH's ssh client has been reported in Debian's BTS:
If the ssh server offers a HostCertificate that the ssh client doesn't accept,
then the client doesn't then check the DNS for SSHFP records. This is a
security problem because it means that a malicious server can disable SSHFP-
checking by presenting a certificate. Note that users are still presented the
well-known "host verification prompt".
Given the prompt will and the still rather peripheral reliance on SSHFP, we
consider this an issue of low severity.
Please assign a CVE name for this issue.
Debian Security Team
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