Title: Multiple Vendor dump Insecure Environment Variables Vulnerability
Severity: MODERATE
Description:
dump is a utility included with various UNIX clones for the purpose of dumping filesystems. A vulnerability exists in the dump package that allows suid execution of other executables.
The dump command is dependent upon the RSH and TAPE environment variables in Linux implementations, and the RCMD_CMD environment variable in some BSD implemenations for proper execution.
As implemented with most Linux distributions, this program is a suid root application. The NetBSD implementation is installed as a suid tty application.
It is possible for a malicious user to set the RSH environment variable in Linux or RCMD_CMD environment variable in BSD to the path of any executable. Upon execution of dump program, the file referenced in the path of the environment variable will be executed with suid root priviledges. Successful exploitation of this vulnerability results in root compromise.
Affected Products:
- NetBSD NetBSD 1.5.0
- NetBSD NetBSD 1.5.1
- RedHat Linux 6.2.0 alpha
- RedHat Linux 6.2.0 i386
- RedHat Linux 6.2.0 sparc
- RedHat dump 0.4.0 b15-1
- Trustix Secure Linux 1.1.0
- WireX Immunix OS 6.2.0
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