Title: sdiff /tmp File Race Condition Vulnerability
Severity: MODERATE
Description:
diffutils is a cornerstone package of all Linux distributions. It is a freely available, open source, publicly maintained software package available through the GNU.
A problem in the sdiff program included with diffutils could create a race condition. This vulnerability is in the creation and handling of files in the /tmp directory. Under certain circumstances, sdiff will create files in the /tmp directory, which is done insecurely by first not checking for the existance of the file, and additionally by using a predictable filename. It is possible to create a range of symbolic links to a file that is write-accessible to the user executing the sdiff program, thus resulting in a symbolic link attack if the sdiff program attempts to create one of the predicted filenames.
The result is the possibility of a user with malicious motives overwriting or appending to and corrupting a file that is write-accessible by the UID of the sdiff process.
Affected Products:
- MandrakeSoft Corporate Server 1.0.1
- MandrakeSoft Linux Mandrake 6.0.0
- MandrakeSoft Linux Mandrake 6.1.0
- MandrakeSoft Linux Mandrake 7.0.0
- MandrakeSoft Linux Mandrake 7.1.0
- MandrakeSoft Linux Mandrake 7.2.0
- RedHat Linux 5.2.0
- RedHat Linux 5.2.0 alpha
- RedHat Linux 5.2.0 i386
- RedHat Linux 5.2.0 sparc
- RedHat Linux 6.2.0
- RedHat Linux 6.2.0 alpha
- RedHat Linux 6.2.0 i386
- RedHat Linux 6.2.0 sparc
- RedHat Linux 7.0.0
- RedHat Linux 7.0.0 alpha
- RedHat Linux 7.0.0 i386
- RedHat Linux 7.1.0 alpha
- RedHat Linux 7.1.0 i386
- RedHat Linux 7.1.0 ia64
- RedHat diffutils-2.7-11.i386.rpm 0.0.0
- RedHat diffutils-2.7-17.i386.rpm 0.0.0
- RedHat diffutils-2.7-21.i386.rpm 0.0.0
- Trustix Secure Linux 1.1.0
- Trustix Secure Linux 1.2.0
- WireX Immunix OS 7.0.0 -Beta
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