Actu
Vigil@nce: Lynx, two vulnerabilities
November 2008 by Vigil@nce
Two vulnerabilities of Lynx can be used by a local or remote
attacker to execute code on victim’s computer.
– Gravity: 2/4
– Consequences: user access/rights
– Provenance: internet server
– 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: 28/10/2008
IMPACTED PRODUCTS
– Mandriva Corporate
– Mandriva Linux
– Mandriva Multi Network Firewall
– Red Hat Enterprise Linux
– Unix - plateform
DESCRIPTION
The Lynx program is a text mode web browser. It has two
vulnerabilities.
The "lynxcgi://" uris are used to execute local CGI scripts
installed on user’s computer. In the interactive mode, Lynx warns
the user before running these commands. However, when Lynx is run
automatically as a url handler, the CGI command is directly
executed. [grav:2/4; 468184, CVE-2008-4690]
The PERSONAL_MAILCAP (.mailcap) and PERSONAL_EXTENSION_MAP
(.mime.types) files indicate how to open documents depending on
their MIME type. For example, to open a document with the
"image/gif" MIME type, run "gimp %s". However, Lynx searches these
files in the current directory. An attacker can therefore create
these files in a directory, and then invite the victim to start
Lynx in this directory to see a GIF image, which will run the gimp
program. [grav:1/4; 214205, CVE-2006-7234]
CHARACTERISTICS
– Identifiers: 214205, 468184, CVE-2006-7234, CVE-2008-4690,
MDVSA-2008:217, MDVSA-2008:218, RHSA-2008:0965-01,
VIGILANCE-VUL-8206
– Url: http://vigilance.aql.fr/vulnerability/8206
