OSV-2021-543 Heap-use-after-free in dxf_objects_read
A heap-use-after-free vulnerability in the DXF reader allows attackers to cause crashes or potentially execute code via malicious files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2021-543?
OSV-2021-543 is an use after free vulnerability in libredwg, published on 21 Mar 2021. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32275
Crash type: Heap-use-after-free READ 2
Crash state:
dxf_objects_read
dwg_read_dxf
llvmfuzz.c
Which versions are affected by OSV-2021-543?
1 open source package ship an affected version, including libredwg.
| Package | Affected | Fixed in |
|---|---|---|
libredwg OSS-Fuzz | All versions | None |
How do I fix OSV-2021-543?
No fix has been published for OSV-2021-543 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-2021-543 being exploited?
There is no known exploitation of OSV-2021-543 in the wild and no public exploit code.