Title: Multiple Linux Vendor Expect Insecure Library Loading Vulnerability
Severity: MODERATE
Description:
Expect is a freely available tool designed for automating interactive programs such as telnet, ftp, and so forth. The program was originally written by Don Libes.
Expect as implemented on some Linux distributions makes it possible to execute arbitrary code. This may lead to a local user gaining elevated privileges, and potentially root access. The problem is in the searching of dynamic libraries.
As implemented on some Linux distributions, when expect is executed, it searches insecure directories for dynamic libraries before execution. One such directory is /var/tmp, which on some Linux distributions is a world-writable temporary directory.
It is possible for a local user to build a malicious library, and place it in the /var/tmp directory. When a local user executes a program or script using expect, the malicious library in /var/tmp will be loaded. This could result in the execution of arbitrary code. Depending on the privileges of the user, it could also result in a local user gaining arbitrary administrative access.
Affected Products:
- Conectiva Linux 6.0.0
- Conectiva Linux 7.0.0
- HP Secure OS software for Linux 1.0.0
- MandrakeSoft Linux Mandrake 7.2.0
- MandrakeSoft Linux Mandrake 8.0.0
- MandrakeSoft Linux Mandrake 8.0.0 ppc
- MandrakeSoft Linux Mandrake 8.1.0
- MandrakeSoft Linux Mandrake 8.1.0 ia64
- MandrakeSoft Linux Mandrake 8.2.0
- MandrakeSoft Linux Mandrake 8.2.0 ppc
- MandrakeSoft Single Network Firewall 7.2.0
- RedHat Linux 7.0.0
- RedHat Linux 7.0.0 alpha
- RedHat Linux 7.0.0 i386
- RedHat Linux 7.1.0
- RedHat Linux 7.1.0 alpha
- RedHat Linux 7.1.0 i386
- RedHat Linux 7.1.0 ia64
- RedHat Linux 7.1.0 iseries
- RedHat Linux 7.1.0 pseries
References:
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