In Artifex Ghostscript through 9.25, the setpattern operator did not properly validate certain types. A specially crafted PostScript document could exploit this to crash Ghostscript or, possibly, execute arbitrary code in the context of the Ghostscript process. This is a type confusion issue because of failure to check whether the Implementation of a pattern dictionary was a structure type.
The product does not correctly convert an object, resource, or structure from one type to a different type.
| Link | Tags |
|---|---|
| https://access.redhat.com/errata/RHSA-2018:3834 | third party advisory vendor advisory |
| https://bugs.ghostscript.com/show_bug.cgi?id=700141 | issue tracking permissions required third party advisory |
| http://git.ghostscript.com/?p=ghostpdl.git%3Ba=commitdiff%3Bh=693baf02152119af6e6afd30bb8ec76d14f84bbf | |
| https://semmle.com/news/semmle-discovers-severe-vulnerability-ghostscript-postscript-pdf | third party advisory exploit |
| http://www.securityfocus.com/bid/106278 | vdb entry third party advisory |
| https://lists.debian.org/debian-lts-announce/2018/12/msg00019.html | third party advisory mailing list |
| https://www.ghostscript.com/doc/9.26/News.htm | release notes |