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TITLE:
SDL_image Two Buffer Overflow Vulnerabilities

SECUNIA ADVISORY ID:
SA28640

VERIFY ADVISORY:
http://secunia.com/advisories/28640/

CRITICAL:
Moderately critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
SDL_image 1.x
http://secunia.com/product/17291/

DESCRIPTION:
Two vulnerabilities have been reported in SDL_image, which can be
exploited by malicious people to cause a DoS (Denial of Service) or
potentially compromise an application using the library.

1) A boundary error within the "LWZReadByte()" function in IMG_gif.c
can be exploited to trigger the overflow of a static buffer via a
specially crafted GIF file.

2) A boundary error within the "IMG_LoadLBM_RW()" function in
IMG_lbm.c can be exploited to cause a heap-based buffer overflow via
a specially crafted IFF ILBM file.    

The vulnerabilities are reported in version 1.2.6. Prior versions may
also be affected.

SOLUTION:
Fixed in SVN repository.
http://www.libsdl.org/cgi/viewvc.cgi/trunk/SDL_image/IMG_gif.c?r1=2970&r2=3462
http://www.libsdl.org/cgi/viewvc.cgi/trunk/SDL_image/IMG_lbm.c?r1=3341&r2=3521

PROVIDED AND/OR DISCOVERED BY:
1) The vendor credits Michael Skladnikiewicz. Also reported by
Gynvael Coldwind, Team Vexillium.
2) The vendor credits David Raulo.

ORIGINAL ADVISORY:
1)
http://www.libsdl.org/cgi/viewvc.cgi/trunk/SDL_image/CHANGES?revision=3462&view=markup

    http://vexillium.org/?sec-sdlgif
2)
http://www.libsdl.org/cgi/viewvc.cgi/trunk/SDL_image/IMG_lbm.c?r1=3341&r2=3521

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