OSV-2021-386 Stack-buffer-overflow in ot::Coap::Message::AppendUintOption
A stack buffer overflow in the OpenThread CoAP library allows remote attackers to cause denial of service or potentially execute code via crafted messages.
- 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-2021-386?
OSV-2021-386 is a memory corruption vulnerability in openthread, published on 13 Feb 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=30831
Crash type: Stack-buffer-overflow READ 1
Crash state:
ot::Coap::Message::AppendUintOption
ot::Coap::Message::AppendBlockOption
otCoapMessageAppendBlock2Option
Which versions are affected by OSV-2021-386?
1 open source package ship an affected version, including openthread.
| Package | Affected | Fixed in |
|---|---|---|
openthread OSS-Fuzz | All versions | None |
How do I fix OSV-2021-386?
No fix has been published for OSV-2021-386 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-2021-386 being exploited?
There is no known exploitation of OSV-2021-386 in the wild and no public exploit code.