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Vigil@nce: GNU M4, file modification via dist and distcheck

March 2010 by Vigil@nce

When the dist and distcheck targets of GNU M4 are used, a local
attacker can alter a file.

 Severity: 2/4
 Consequences: data creation/edition
 Provenance: user shell
 Means of attack: no proof of concept, no attack
 Ability of attacker: expert (4/4)
 Confidence: confirmed by the editor (5/5)
 Diffusion of the vulnerable configuration: high (3/3)
 Creation date: 25/02/2010

IMPACTED PRODUCTS

 Unix - plateform

DESCRIPTION OF THE VULNERABILITY

The GNU M4 program generates files from macros.

However, GNU M4 can use a vulnerable version of GNU Automake
(VIGILANCE-VUL-9302 (https://vigilance.fr/tree/1/9302)).

When the dist and distcheck targets of GNU M4 are used, a local
attacker can therefore alter a file.

CHARACTERISTICS

 Identifiers: VIGILANCE-VUL-9475
 Url: http://vigilance.fr/vulnerability/GNU-M4-file-modification-via-dist-and-distcheck-9475


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