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libexif: Integer overflow vulnerability


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200706-01 / libexif
Release Date June 05, 2007
Latest Revision June 05, 2007: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
media-libs/libexif < 0.6.15 >= 0.6.15 All supported architectures

Related bugreports: #178081


libexif fails to handle Exif (EXchangeable Image File) data inputs, making it vulnerable to an integer overflow.

2.  Impact Information


libexif is a library for parsing, editing and saving Exif data.


Victor Stinner reported an integer overflow in the exif_data_load_data_entry() function from file exif-data.c while handling Exif data.


An attacker could entice a user to process a file with specially crafted Exif extensions with an application making use of libexif, which will trigger the integer overflow and potentially execute arbitrary code or crash the application.

3.  Resolution Information


There is no known workaround at this time.


All libexif users should upgrade to the latest version. Please note that users upgrading from "<=media-libs/libexif-0.6.13" should also run revdep-rebuild after their upgrade.

Code Listing 3.1: Resolution

# emerge --sync
# emerge --ask --oneshot --verbose ">=media-libs/libexif-0.6.15"
# revdep-rebuild --library=/usr/lib/

4.  References


Page updated June 05, 2007

Summary: This is a Gentoo Linux Security Advisory

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