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Vigil@nce: sudo, privilege elevation

March 2010 by Vigil@nce

A local attacker, allowed to execute sudoedit, can execute commands with root privileges.

- Severity: 2/4
- Consequences: administrator access/rights
- Provenance: user shell
- Means of attack: 1 attack
- Ability of attacker: technician (2/4)
- Confidence: confirmed by the editor (5/5)
- Diffusion of the vulnerable configuration: high (3/3)
- Creation date: 23/02/2010

IMPACTED PRODUCTS

- Mandriva Corporate
- Mandriva Enterprise Server
- Mandriva Linux
- Red Hat Enterprise Linux
- Unix - plateform

DESCRIPTION OF THE VULNERABILITY

The sudo program is used to allow users to execute some commands with privileges of other users. For example, to allow the edition of a file with root privileges: user ALL = sudoedit filename The sudoedit command does not have a full path (/bin/sudoedit), because it is a pseudo-command, which is interpreted especially.

However, since sudo version 1.6.9, if a real command has this name, this rule is also applied. This real command is thus run with root privileges.

A local attacker, allowed to execute sudoedit, can therefore execute commands with root privileges.

CHARACTERISTICS

- Identifiers: CVE-2010-0426, MDVSA-2010:049, RHSA-2010:0122-01, VIGILANCE-VUL-9468
- Url: http://vigilance.fr/vulnerability/s...




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