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USN-25-1: libgd2 vulnerability

16 November 2004

libgd2 vulnerability



CAN-2004-0990 described several more buffer overflows which had been
discovered in libgd2's PNG handling functions. However, it was
determined that the update from USN-11-1 was not sufficient to prevent
every possible attack, so another update is required.

If an attacker tricked a user into loading a malicious PNG image, they
could leverage this into executing arbitrary code in the context of
the user opening image. Most importantly, this library is commonly
used in PHP. One possible target would be a PHP driven photo website
that lets users upload images. Therefore this vulnerability might lead
to privilege escalation to a web server's privileges.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 4.10
  • libgd2-xpm -
  • libgd2-noxpm -

In general, a standard system update will make all the necessary changes.


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