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TITLE:
libexif EXIF Tag Structure Validation Vulnerability

SECUNIA ADVISORY ID:
SA14504

VERIFY ADVISORY:
http://secunia.com/advisories/14504/

CRITICAL:
Highly critical

IMPACT:
DoS, System access

WHERE:
>From remote

SOFTWARE:
libexif 0.x
http://secunia.com/product/4755/

DESCRIPTION:
Sylvain Defresne has reported a vulnerability in libexif, which can
be exploited by malicious people to cause a DoS (Denial of Service)
or compromise vulnerable systems.

The vulnerability is caused due to an error within the validation of
EXIF tag structures and can be exploited via a malicious image file
containing a specially crafted EXIF tag.

Successful exploitation crashes an application linked against the
vulnerable library and may also allow execution of arbitrary code
with the privileges of the application.

The vulnerability has been reported in version 0.6.9. Other versions
may also be affected.

SOLUTION:
Secunia is currently not aware of an official version or patch
addressing this vulnerability.

Don't process untrusted images in applications using libexif.

PROVIDED AND/OR DISCOVERED BY:
Sylvain Defresne

ORIGINAL ADVISORY:
http://www.ubuntulinux.org/support/documentation/usn/usn-91-1

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