Title: Ncompress Insecure Temporary File Creation Vulnerability
Severity: MODERATE
Description:
Ncompress is a file compression and decompression utility.
The issue is due to an insecure manner in which the ncompress scripts "build", "zcmp" and "zdiff" create temporary files in the '/tmp' directory.
A local attacker would most likely take advantage of this vulnerability by creating a malicious symbolic link in a directory where the temporary files will be created. When the program attempts to perform an operation on the temporary files, it will instead perform the operation on the file pointed to by the malicious symbolic link.
Exploitation would most likely result in loss of data or a denial of service if critical files are overwritten in the attack. Other attacks may also be possible.
The vulnerability is reported in version 4.2.4. Other versions may also be affected.
Affected Products:
- ncompress ncompress 4.2.4
References:
- RedHat: RedHat RPM
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