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Vigil@nce - ppp: integer overflow of pppd/options.c

December 2014 by Vigil@nce

This bulletin was written by Vigil@nce : http://vigilance.fr/offer

SYNTHESIS OF THE VULNERABILITY

An attacker can generate an integer overflow in pppd/options.c of
ppp, in order to trigger a denial of service, and possibly to
execute code with root privileges.

Impacted products: Debian, Fedora, MBS, openSUSE, Ubuntu, Unix
(platform)

Severity: 2/4

Creation date: 01/12/2014

DESCRIPTION OF THE VULNERABILITY

The ppp suite implements the PPP protocol.

However, if an option provided by a local user is too large, an
integer overflows, and the getword() function of the
pppd/options.c file continues to write in memory.

An attacker can therefore generate an integer overflow in
pppd/options.c of ppp, in order to trigger a denial of service,
and possibly to execute code with root privileges.

ACCESS TO THE COMPLETE VIGIL@NCE BULLETIN

http://vigilance.fr/vulnerability/ppp-integer-overflow-of-pppd-options-c-15724


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