SSH Tectia Server PID and HFS privilege escalation

ssh-tectia-pid-hfs-privilege-escalation (33699) The risk level is classified as MediumMedium Risk

Description:

The SSH Tectia Server could allow a local attacker to gain elevated privileges caused by improper restriction on the PID and HFS files. A local attacker could exploit this vulnerability to gain elevated privileges.

Platforms Affected:

  • IBM, zOS
  • SSH, Tectia Server 5.3.0

Remedy:

Upgrade to the latest version of SSH Tectia Server (5.4.0 or later), available from the SSH Tectia Server Web site. See References.

Consequences:

Gain Privileges

References:

  • SSH Tectia Server Web site, SSH - Products - SSH Tectia Server for IBM z/OS at http://www.ssh.com/products/server-zos/.
  • SSH.com Web site, Release Notes for SSH Tectia Server 5.4.0 for IBM z/OS at http://www.ssh.com/documents/33/SSH_Tectia_Server_5.4.0_zOS_releasenotes.txt.
  • BID-23508: SSH Tectia Server IBM z/OS Local Privilege Escalation Vulnerability
  • CVE-2007-2063: SSH Tectia Server for IBM z/OS before 5.4.0 uses insecure world-writable permissions for (1) the server pid file, which allows local users to cause arbitrary processes to be stopped, or (2) when _BPX_BATCH_UMASK is missing from the environment, creates HFS files with insecure permissions, which allows local users to read or modify these files and have other unknown impact.
  • FrSIRT/ADV-2007-1414: SSH Tectia Server for z/OS Multiple File and Directory Insecure Permissions Vulnerability
  • OSVDB ID: 35014: SSH Tectia Server for IBM z/OS pid File Permission Weakness Local
  • SA24916: SSH Tectia Server Insecure Permissions
  • SECTRACK ID: 1017913: SSH Tectia Server Insecure File Permissions May Let Local Users Gain Elevated Privileges

Reported:

Apr 16, 2007

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