OSV-2021-1802 UNKNOWN READ in pdfi_count_cff_index
A memory corruption vulnerability in the PDF parsing library allows attackers to cause a denial of service via crafted PDF 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-2021-1802?
OSV-2021-1802 is a memory corruption vulnerability in ghostscript, published on 15 Jan 2022. 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=43599
Crash type: UNKNOWN READ
Crash state:
pdfi_count_cff_index
pdfi_read_cff_font
pdfi_load_font
Which versions are affected by OSV-2021-1802?
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-2021-1802?
No fix has been published for OSV-2021-1802 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2021-1802 being exploited?
There is no known exploitation of OSV-2021-1802 in the wild and no public exploit code.