GHSA-3w9w-9833-gcpv Security bug in ConvertToSinglePlane when used with untrusted content from the DDS loader
A memory overwrite vulnerability in DirectXTex allows attackers to potentially execute code or cause denial of service via crafted planar video textures.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-3w9w-9833-gcpv?
GHSA-3w9w-9833-gcpv is a memory corruption vulnerability in directxtex_desktop_2019, published on 26 Jan 2023.
Official description
Impact
A memory overwrite bug was reported by a security researcher in the ConvertToSinglePlane method via the texconv command-line tool when given an invalid height for planar video textures such as NV12. This can be a potential security bug for any clients of the library who follow the same pattern.
This issue does not impact use of the DDS texture loader itself, only when combined with ConvertToSinglePlane for converting multi-planar video formats. All other functions in the library fail immediately if given images in planar formats.
Patches
The fix to the specific area as well as general hardening can be found in this PR and will be included in the This bug has been fixed in the January 31, 2023 or later release of DirectXTex.
Workarounds
If your code makes use of ConvertToSinglePlane, you can validate that the width & height alignment requirements are met for the input image before calling the function.
Which versions are affected by GHSA-3w9w-9833-gcpv?
6 open source packages ship an affected version, including directxtex_desktop_2019, directxtex_desktop_win10 and directxtex_uwp.
| Package | Affected | Fixed in |
|---|---|---|
directxtex_desktop_2019 NuGet | All versions | 2023.1.31.1 |
directxtex_desktop_2019 NuGet | All versions | 2023.1.31.1 |
directxtex_desktop_win10 NuGet | All versions | 2023.1.31.1 |
directxtex_desktop_win10 NuGet | All versions | 2023.1.31.1 |
directxtex_uwp NuGet | All versions | 2023.1.31.1 |
directxtex_uwp NuGet | All versions | 2023.1.31.1 |
How do I fix GHSA-3w9w-9833-gcpv?
Upgrade directxtex_desktop_2019 to 2023.1.31.1 or later.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is GHSA-3w9w-9833-gcpv being exploited?
There is no known exploitation of GHSA-3w9w-9833-gcpv in the wild and no public exploit code.