The gs_makewordimagedevice function in base/gsdevmem.c in Artifex Software, Inc. Ghostscript 9.20 allows remote attackers to cause a denial of service (NULL pointer dereference and application crash) via a crafted file that is mishandled in the PDF Transparency module.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Ghostscript | Artifex | 9.20 (including) | 9.20 (including) |
| Ghostscript | Ubuntu | devel | * |
| Ghostscript | Ubuntu | esm-infra/xenial | * |
| Ghostscript | Ubuntu | precise | * |
| Ghostscript | Ubuntu | trusty | * |
| Ghostscript | Ubuntu | upstream | * |
| Ghostscript | Ubuntu | xenial | * |
| Ghostscript | Ubuntu | yakkety | * |
| Ghostscript | Ubuntu | zesty | * |
Potential Mitigations
References
- http://www.debian.org/security/2017/dsa-3838
- http://www.ghostscript.com/cgi-bin/findgit.cgi?daf85701dab05f17e924a48a81edc9195b4a04e8
- https://bugs.ghostscript.com/show_bug.cgi?id=697450
- https://security.gentoo.org/glsa/201708-06
- http://www.debian.org/security/2017/dsa-3838
- http://www.ghostscript.com/cgi-bin/findgit.cgi?daf85701dab05f17e924a48a81edc9195b4a04e8
- https://bugs.ghostscript.com/show_bug.cgi?id=697450
- https://security.gentoo.org/glsa/201708-06