Vulnerability Report

CVE-2023-46129

Title: Nats Nats Server Cryptographic Failures

Other

Proof Of Concept

No public PoC currently indexed for CVE-2023-46129.

CWE Category CWE-321
Published Date Oct 31, 2023
Modified Date Mar 30, 2026
Exploit Status Not Found
Score 7.5 CVSS v3.1
Exploit Probability (EPSS)
0.15%

Vulnerability Summary

CVE-2023-46129: 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.

Impacted Vendors

N
nats 2
L
linuxfoundation 1

Reference Links

http://www.openwall.com/lists/oss-security/2023/10/31/1 https://github.com/nats-io/nkeys/security/advisories/GHSA-mr45-rx8q-wcm9 https://lists.fedoraproject.org/archives/list/[email protected]/message/R3UETKPUB3V5JS5TLZOF3SMTGT5K5APS/ https://lists.fedoraproject.org/archives/list/[email protected]/message/ULQQONMSCQSH5Z5OWFFQHCGEZ3NL4DRJ/ http://www.openwall.com/lists/oss-security/2023/10/31/1 https://github.com/nats-io/nkeys/security/advisories/GHSA-mr45-rx8q-wcm9 https://lists.fedoraproject.org/archives/list/[email protected]/message/R3UETKPUB3V5JS5TLZOF3SMTGT5K5APS/ https://lists.fedoraproject.org/archives/list/[email protected]/message/ULQQONMSCQSH5Z5OWFFQHCGEZ3NL4DRJ/
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v3.1
Source Entity [email protected]
Severity HIGH
7.5
Attack Vector
NETWORK
Complexity
LOW
Privileges
N/A
Interaction
NONE
Confidentiality
N/A
Integrity
N/A
Availability
N/A
Scope
UNCHANGED
RAW VECTOR CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2023-46129 Exploits & PoCs (Proof Of Concept)

No public PoCs found in our database for this CVE.

MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector NETWORK
Complexity LOW
Privileges N/A
Interaction NONE
CVSS Vector String CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected Stack

No specific products linked.