OSV-2020-1946 Heap-buffer-overflow in x509_parse_ext_basic_constraints
A heap buffer overflow in X.509 certificate parsing allows attackers to cause denial of service or potentially execute code via malicious certificates.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2020-1946?
OSV-2020-1946 is a memory corruption vulnerability in hostap, published on 2 Oct 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=15451
Crash type: Heap-buffer-overflow READ 1
Crash state:
x509_parse_ext_basic_constraints
x509_parse_extension
x509_parse_extensions
Which versions are affected by OSV-2020-1946?
1 open source package ship an affected version, including hostap.
| Package | Affected | Fixed in |
|---|---|---|
hostap OSS-Fuzz | All versions | None |
How do I fix OSV-2020-1946?
No fix has been published for OSV-2020-1946 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-2020-1946 being exploited?
There is no known exploitation of OSV-2020-1946 in the wild and no public exploit code.