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Vigil@nce: Linux kernel, denials of service via HFS Plus

November 2008 by Vigil@nce

SYNTHESIS

A local attacker can mount a malicious HFS Plus image in order to stop the system.

Gravity: 1/4

Consequences: denial of service of computer

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)

Number of vulnerabilities in this bulletin: 2

Creation date: 10/11/2008

IMPACTED PRODUCTS

- Linux kernel

DESCRIPTION

The HFS Plus (HFS+) filesystem is mainly used on Mac OS. The fs/hfsplus directory contains the HFS Plus implementation for Linux. It contains two vulnerabilities.

A HPF Plus image containing a malicious catalog generates an error in the hfsplus_find_cat() function of fs/hfsplus/catalog.c. [grav:1/4; BID-32093, CVE-2008-4934]

A malicious HPF Plus image generates an error in the hfsplus_find_allocate() function of fs/hfsplus/bitmap.c. [grav:1/4; BID-32096, CVE-2008-4934]

CHARACTERISTICS

Identifiers: BID-32093, BID-32096, CVE-2008-4934, VIGILANCE-VUL-8231

http://vigilance.fr/vulnerability/8231




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