SYNTHESIS OF THE VULNERABILITY

An attacker can use several vulnerabilities of PHP in order to bypass file access restrictions.

Severity: 2/4

Consequences: data reading, data creation/edition, data deletion

Provenance: user account

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: 3

Creation date: 01/03/2010

IMPACTED PRODUCTS

 PHP

DESCRIPTION OF THE VULNERABILITY

Several vulnerabilities were announced in PHP 5.

An attacker can use the tempnam() PHP function, on a directoty name not ending with ’/’, in order to create a file outside allowed directories. [severity:2/4; BID-38431]

An attacker can use the session_save_path() PHP function, in order to create a file outside allowed directories (VIGILANCE-VUL-9443 (https://vigilance.fr/tree/1/9443)). [severity:2/4; BID-38182]

The LCG (Linear Congruential Generator) is not sufficiently random. [severity:1/4; BID-38430]

These vulnerabilities are local or remote depending on the context.

CHARACTERISTICS

Identifiers: BID-38182, BID-38430, BID-38431, VIGILANCE-VUL-9478

http://vigilance.fr/vulnerability/P...