83135 : IBM AIX fibred /var/tmp/fibred.log Symlink Arbitrary File Manipulation Privilege Escalation
Printer | http://osvdb.org/83135 | Email This | Edit Vulnerability

Views This Week	Views All Time	Added to OSVDB	Last Modified	Modified (since 2008)	Percent Complete
6	389	11 months ago	11 months ago	1 times	100%

Timeline

Disclosure Date
1996-11-12

Description

IBM AIX contains a flaw that may allow a malicious local user to manipulate arbitrary files on the system. The issue is due to the /usr/sbin/fibred script creating temporary files insecurely. It is possible for a local attacker to use a symlink attack against the /usr/sbin/fibred.log file to cause the program to unexpectedly write to, or overwrite an attacker specified file. This may allow an attacker to gain escalated privileges

Classification

Location: Local Access Required
Attack Type: Race Condition
Impact: Loss of Integrity
Solution: Workaround
Exploit: Exploit Public
Disclosure: Uncoordinated Disclosure

Solution

Currently, there are no known upgrades or patches to correct this vulnerability. It is possible to temporarily work around the flaw by implementing the following workaround: Restrict access to fibred.

Products

IBM Corporation

AIX

4.2

References

Generic Exploit URL: http://osvdb.org/ref/83/AIX-42-fibred_symlink.sh

Credit

Not Available

CVSSv2 Score

NVD does not currently have a CVSSv2 score assigned.

Comments

Add Comment Hide Add Comment

No Comments.

The database information may change without any notice. Use of the information constitutes acceptance for use in an AS IS condition, and there are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the copyright holder or distributor (OSVDB or OSF) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.