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Vulnerability of AIX: vulnerability of umountall

Synthesis of the vulnerability 

The umountall command has a vulnerability.
Impacted products: AIX.
Severity of this bulletin: 1/4.
Creation date: 07/12/2005.
Références of this threat: BID-15758, CVE-2005-4068, IY75283, IY75294, IY79485, VIGILANCE-VUL-5409.

Description of the vulnerability 

The umountall command unmounts all file systems, excepted /, /proc, /usr and /var.

IBM announced a vulnerability in this command. Its technical details are unknown.

This vulnerability could result of a call to external commands, without using their full pathname. An attacker then could create a trojan with umount name in order to run code with rights of umountall user.
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This weakness announce impacts software or systems such as AIX.

Our Vigil@nce team determined that the severity of this vulnerability alert is low.

The trust level is of type confirmed by the editor, with an origin of user shell.

An attacker with a expert ability can exploit this computer threat announce.

Solutions for this threat 

AIX: APAR for umountall.
APARs are available:
  AIX 5.1 : IY79485
  AIX 5.3 : IY75283
  AIX 5.3 : IY75294
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