nimiq core-rs-albatross up to 1.0.x nimiq-network-libp2p length resource consumption

Summaryinfo

A vulnerability, which was classified as problematic, was found in nimiq core-rs-albatross up to 1.0.x. Impacted is an unknown function of the component nimiq-network-libp2p. Such manipulation of the argument length leads to resource consumption. This vulnerability is traded as CVE-2025-47270. The attack may be launched remotely. There is no exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in nimiq core-rs-albatross up to 1.0.x. Affected by this issue is some unknown functionality of the component nimiq-network-libp2p. The manipulation of the argument length with an unknown input leads to a resource consumption vulnerability. Using CWE to declare the problem leads to CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. Impacted is availability. CVE summarizes:

nimiq/core-rs-albatross is a Rust implementation of the Nimiq Proof-of-Stake protocol based on the Albatross consensus algorithm. The `nimiq-network-libp2p` subcrate of nimiq/core-rs-albatross is vulnerable to a Denial of Service (DoS) attack due to uncontrolled memory allocation. Specifically, the implementation of the `Discovery` network message handling allocates a buffer based on a length value provided by the peer, without enforcing an upper bound. Since this length is a `u32`, a peer can trigger allocations of up to 4 GB, potentially leading to memory exhaustion and node crashes. As Discovery messages are regularly exchanged for peer discovery, this vulnerability can be exploited repeatedly. The patch for this vulnerability is formally released as part of v1.1.0. The patch implements a limit to the discovery message size of 1 MB and also resizes the message buffer size incrementally as the data is read. No known workarounds are available.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2025-47270 since 05/05/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 1.1.0 eliminates this vulnerability. The upgrade is hosted for download at github.com. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

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Productinfo

Vendor

• nimiq

Name

• core-rs-albatross

Version

• 1.0

Website

• Product: https://github.com/nimiq/core-rs-albatross/

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