OSV-2021-807 Stack-buffer-overflow in DecodeSingleResponse
A stack buffer overflow in the OCSP response decoder allows attackers to execute arbitrary code or cause denial of service via crafted responses.
- 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-2021-807?
OSV-2021-807 is a memory corruption vulnerability in wolfssl, published on 28 May 2021. 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=34713
Crash type: Stack-buffer-overflow WRITE {*}
Crash state:
DecodeSingleResponse
DecodeResponseData
DecodeBasicOcspResponse
Which versions are affected by OSV-2021-807?
1 open source package ship an affected version, including wolfssl.
| Package | Affected | Fixed in |
|---|---|---|
wolfssl OSS-Fuzz | All versions | None |
How do I fix OSV-2021-807?
No fix has been published for OSV-2021-807 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-2021-807 being exploited?
There is no known exploitation of OSV-2021-807 in the wild and no public exploit code.