OSV-2021-1753 UNKNOWN READ in names_string_ref
An unknown read vulnerability in the PDF processing library can cause a crash when handling malformed font data, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2021-1753?
OSV-2021-1753 is a memory corruption vulnerability in ghostscript, published on 25 Dec 2021. An attacker can exploit it over the internet without logging in, 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=42907
Crash type: UNKNOWN READ
Crash state:
names_string_ref
zfont_glyph_name
pdfi_fapi_get_glyphname_or_cid
Which versions are affected by OSV-2021-1753?
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-2021-1753?
No fix has been published for OSV-2021-1753 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-2021-1753 being exploited?
There is no known exploitation of OSV-2021-1753 in the wild and no public exploit code.