CVE-2021-43669 HTTP Request Smuggling in github.com/hyperledger/fabric
Attackers can cause denial of service in HyperLedger Fabric orderers by sending messages with invalid headers to the Order interface.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-43669?
CVE-2021-43669 is a high-severity denial of service vulnerability in n/a, published on 18 Nov 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.0.1, v2.3.0. It can easily break down as many orderers as the attacker wants. This bug can be leveraged by constructing a message whose header is invalid to the interface Order. This bug has been admitted and fixed by the developers of Fabric.
Weakness: CWE-444
Which versions are affected by CVE-2021-43669?
2 open source packages ship an affected version, including github.com/hyperledger/fabric. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
github.com/hyperledger/fabric Go | All versions | 2.4.0 |
github.com/hyperledger/fabric Go | All versions | 2.4.0 |
Products include Linuxfoundation Fabric.
How do I fix CVE-2021-43669?
Upgrade github.com/hyperledger/fabric to 2.4.0 or later.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-43669 being exploited?
There is no known exploitation of CVE-2021-43669 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-j96p-r523-8r3w.