Vulnerability Note VU#125598

LibTIFF is a library used to encode and decode images in Tag Image File Format (TIFF). A lack of validation on user supplied input may allow buffer overflow to occur. TIFF files contain directory entry header fields to describe the data in the file. If a remote attacker creates a TIFF file with specially crafted directory headers and persuades a user to access that file, an integer overflow will occur that may eventually lead to a heap-based buffer overflow.

If a remote attacker can persuade a user to access a specially crafted TIFF image, that attacker may be able to execute arbitrary code with the privileges of that user.

Upgrade or Patch

This issue has been corrected in LibTIFF version 3.7.1. Obtain a patch or upgraded software from your vendor. Recompile statically linked applications.

Do Not Accept TIFF Files from Unknown or Untrusted Sources

Exploitation occurs by accessing a specially crafted TIFF file (typically .tiff or .tif extension). By only accessing TIFF files from trusted or known sources, the chances of exploitation are reduced.