OSV-2021-668 Stack-use-after-return in pdf14_initialize
A stack-use-after-return vulnerability in PDF rendering allows attackers to execute arbitrary code or cause denial of service via malicious files.
- 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-2021-668?
OSV-2021-668 is an use after free vulnerability in ghostscript, published on 22 Apr 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=33529
Crash type: Stack-use-after-return WRITE 8
Crash state:
pdf14_initialize
pdf14_procs_initialize
pdf14_RGB_initialize
Which versions are affected by OSV-2021-668?
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-2021-668?
No fix has been published for OSV-2021-668 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-2021-668 being exploited?
There is no known exploitation of OSV-2021-668 in the wild and no public exploit code.