OSV-2021-1692 Heap-use-after-free in chunk_free_object
A heap-use-after-free vulnerability in a PDF processing library allows attackers to execute arbitrary code or cause denial of service via crafted PDF files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2021-1692?
OSV-2021-1692 is an use after free vulnerability in ghostscript, published on 14 Dec 2021.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=42324
Crash type: Heap-use-after-free READ 8
Crash state:
chunk_free_object
pdfi_open_memory_stream_from_filtered_stream
pdfi_build_mesh_shading
Which versions are affected by OSV-2021-1692?
1 open source package ship an affected version, including ghostscript.
| Package | Affected | Fixed in |
|---|---|---|
ghostscript OSS-Fuzz | All versions | None |
How do I fix OSV-2021-1692?
No fix has been published for OSV-2021-1692 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is OSV-2021-1692 being exploited?
There is no known exploitation of OSV-2021-1692 in the wild and no public exploit code.