CVE-2021-35041 Denial of service in n/a
A malicious node can crash the FISCO-BCOS blockchain node by sending continuously malformed packets, causing memory exhaustion and service disruption.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-35041?
CVE-2021-35041 is a high-severity denial of service vulnerability in n/a, published on 23 Jun 2021. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The blockchain node in FISCO-BCOS V2.7.2 may have a bug when dealing with unformatted packet and lead to a crash. A malicious node can send a packet continuously. The packet is in an incorrect format and cannot be decoded by the node correctly. As a result, the node may consume the memory sustainably and crash. More details are shown at: https://github.com/FISCO-BCOS/FISCO-BCOS/issues/1951
Weakness: CWE-20
Which versions are affected by CVE-2021-35041?
It affects 1 product.
Products include Fisco-Bcos Fisco-Bcos.
How do I fix CVE-2021-35041?
No fix has been published for CVE-2021-35041 yet. Limit exposure of the affected software until one is available.
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-2021-35041 being exploited?
There is no known exploitation of CVE-2021-35041 in the wild and no public exploit code.
Other vulnerabilities in n/a
Sources
Also known as GHSA-5vvg-7wfp-qh9p.