GLSA-200412-01 : rssh, scponly: Unrestricted command execution
High Nessus Plugin ID 15903
SynopsisThe remote Gentoo host is missing one or more security-related patches.
DescriptionThe remote host is affected by the vulnerability described in GLSA-200412-01 (rssh, scponly: Unrestricted command execution)
Jason Wies discovered that when receiving an authorized command from an authorized user, rssh and scponly do not filter command-line options that can be used to execute any command on the target host.
Using a malicious command, it is possible for a remote authenticated user to execute any command (or upload and execute any file) on the target machine with user rights, effectively bypassing any restriction of scponly or rssh.
There is no known workaround at this time.
SolutionAll scponly users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=net-misc/scponly-4.0' All rssh users should upgrade to the latest version:
# emerge --sync # emerge --ask --oneshot --verbose '>=app-shells/rssh/rssh-2.2.3'