CVE-2023-46129 Information

Description

NATS.io is a high performance open source pub-sub distributed communication technology built for the cloud on-premise IoT and edge computing. The cryptographic key handling library nkeys recently gained support for encryption not just for signing/authentication. This is used in nats-server 2.10 (Sep 2023) and newer for authentication callouts. In nkeys versions 0.4.0 through 0.4.5 corresponding with NATS server versions 2.10.0 through 2.10.3 the nkeys library’s xkeys encryption handling logic mistakenly passed an array by value into an internal function where the function mutated that buffer to populate the encryption key to use. As a result all encryption was actually to an all-zeros key. This affects encryption only not signing.
FIXME: FILL IN IMPACT ON NATS-SERVER AUTH CALLOUT SECURITY. nkeys Go library 0.4.6 corresponding with NATS Server 2.10.4 has a patch for this issue. No known workarounds are available. For any application handling auth callouts in Go if using the nkeys library update the dependency recompile and deploy that in lockstep.

Reference

https://github.com/nats-io/nkeys/security/advisories/GHSA-mr45-rx8q-wcm9 http://www.openwall.com/lists/oss-security/2023/10/31/1