Portable OpenSSH ssh-keysign ssh-rand-helper Utility File Descriptor Leak Local Information Disclosure
Low Nessus Plugin ID 53841
SynopsisLocal attackers may be able to access sensitive information.
DescriptionAccording to its banner, the version of OpenSSH running on the remote host is earlier than 5.8p2. Such versions may be affected by a local information disclosure vulnerability that could allow the contents of the host's private key to be accessible by locally tracing the execution of the ssh-keysign utility. Having the host's private key may allow the impersonation of the host.
Note that installations are only vulnerable if ssh-rand-helper was enabled during the build process, which is not the case for *BSD, OS X, Cygwin and Linux.
SolutionUpgrade to Portable OpenSSH 5.8p2 or later.