scponly SSH environment can be used to upload files and execute commands

scponly-ssh-env-upload (9913) The risk level is classified as MediumMedium Risk


scponly could allow a remote attacker with a valid account to upload files and execute commands on the system. A remote attacker could specify a custom path to scp executables in their $HOME/.ssh/environment directory and then upload a malicious script with the name "scp", which could then be used to execute commands on the system.


Gain Access


Upgrade to the latest version of scponly (2.4 or later), available from the scponly Web page. See References.


  • BugTraq Mailing List, Mon Aug 19 2002 - 22:58:50 CDT : vulnerabilities in scponly .
  • scponly Web site: scponly.
  • BID-5526: SCPOnly SSH Environment Shell Escaping Vulnerability
  • CVE-2002-1469: scponly does not properly verify the path when finding the (1) scp or (2) sftp-server programs, which could allow remote authenticated users to bypass access controls by uploading malicious programs and modifying the PATH variable in $HOME/.ssh/environment to locate those programs.
  • OSVDB ID: 9564: scponly SSH Path Environment Subversion Privilege Escalation

Platforms Affected:

  • Joe Boyle scponly prior to 2.4


Aug 19, 2002

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