OSV-2020-639 UNKNOWN READ in ot::Dhcp6::Dhcp6Client::UpdateAddresses
An unknown read error in the OpenThread DHCPv6 client can cause a crash, potentially leading to denial of service for IoT devices.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2020-639?
OSV-2020-639 is a memory corruption vulnerability in openthread, published on 1 Jul 2020. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13332
Crash type: UNKNOWN READ
Crash state:
ot::Dhcp6::Dhcp6Client::UpdateAddresses
ot::Mle::Mle::HandleStateChanged
ot::Notifier::HandleStateChanged
Which versions are affected by OSV-2020-639?
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-2020-639?
No fix has been published for OSV-2020-639 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-2020-639 being exploited?
There is no known exploitation of OSV-2020-639 in the wild and no public exploit code.