A NULL pointer dereference in the function _TIFFmemcmp at tif_unix.c (called from TIFFWriteDirectoryTagTransferfunction) in LibTIFF 4.0.9 allows an attacker to cause a denial-of-service through a crafted tiff file. This vulnerability can be triggered by the executable tiffcp.
Weakness
The product dereferences a pointer that it expects to be valid but is NULL.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Libtiff | Libtiff | 4.0.9 (including) | 4.0.9 (including) |
| Tiff | Ubuntu | bionic | * |
| Tiff | Ubuntu | cosmic | * |
| Tiff | Ubuntu | esm-infra-legacy/trusty | * |
| Tiff | Ubuntu | esm-infra/bionic | * |
| Tiff | Ubuntu | esm-infra/xenial | * |
| Tiff | Ubuntu | trusty | * |
| Tiff | Ubuntu | trusty/esm | * |
| Tiff | Ubuntu | upstream | * |
| Tiff | Ubuntu | xenial | * |
Potential Mitigations
References
- http://bugzilla.maptools.org/show_bug.cgi?id=2811
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00041.html
- http://www.securityfocus.com/bid/105342
- https://lists.debian.org/debian-lts-announce/2019/02/msg00026.html
- https://usn.ubuntu.com/3906-1/
- https://www.debian.org/security/2020/dsa-4670
- http://bugzilla.maptools.org/show_bug.cgi?id=2811
- http://lists.opensuse.org/opensuse-security-announce/2019-04/msg00041.html
- http://www.securityfocus.com/bid/105342
- https://lists.debian.org/debian-lts-announce/2019/02/msg00026.html
- https://usn.ubuntu.com/3906-1/
- https://www.debian.org/security/2020/dsa-4670