CVE-2018-20587 Missing authorization in n/a

Medium 5.5 Published 11 Feb 2019 Updated 5 Aug 2024

Local attackers can steal cryptocurrency by exploiting incorrect access control on RPC ports to bypass authentication mechanisms.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: Available

What is CVE-2018-20587?

CVE-2018-20587 is a medium-severity missing authorization vulnerability in Bitcoin Bitcoin Core, published on 11 Feb 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Bitcoin Core 0.12.0 through 0.17.1 and Bitcoin Knots 0.12.0 through 0.17.x before 0.17.1.knots20181229 have Incorrect Access Control. Local users can exploit this to steal currency by binding the RPC IPv4 localhost port, and forwarding requests to the IPv6 localhost port.

Which versions are affected by CVE-2018-20587?

It affects 2 products.

Products include Bitcoin Bitcoin Core, Bitcoinknots Bitcoin Knots.

How do I fix CVE-2018-20587?

Upgrade to a fixed version.

Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.

Is CVE-2018-20587 being exploited?

There is no known exploitation of CVE-2018-20587 in the wild and no public exploit code.

All Bitcoin Bitcoin Core vulnerabilities

Sources

Also known as GHSA-rr2v-hv85-27hv.