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Security Advisories: GSA_kwCzR0hTQS1tcjQ1LXJ4OHEtd2NtOc4AA207
xkeys seal encryption used fixed key for all encryption
Background
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.
Problem Description
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.
Affected versions
nkeys Go library:
- 0.4.0 up to and including 0.4.5
- Fixed with nats-io/nkeys: 0.4.6
NATS Server:
- 2.10.0 up to and including 2.10.3
- Fixed with nats-io/nats-server: 2.10.4
Solution
Upgrade the nats-server.
For any application handling auth callouts in Go, if using the nkeys library, update the dependency, recompile and deploy that in lockstep.
Credits
Problem reported by Quentin Matillat (GitHub @tinou98).
Permalink: https://github.com/advisories/GHSA-mr45-rx8q-wcm9JSON: https://advisories.ecosyste.ms/api/v1/advisories/GSA_kwCzR0hTQS1tcjQ1LXJ4OHEtd2NtOc4AA207
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: 6 months ago
Updated: 5 months ago
CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Identifiers: GHSA-mr45-rx8q-wcm9, CVE-2023-46129
References:
- https://github.com/nats-io/nkeys/security/advisories/GHSA-mr45-rx8q-wcm9
- https://nvd.nist.gov/vuln/detail/CVE-2023-46129
- http://www.openwall.com/lists/oss-security/2023/10/31/1
- https://github.com/nats-io/nkeys/commit/58fb9d69f42ea73fffad1d14e5914dc666f3daa1
- https://lists.fedoraproject.org/archives/list/[email protected]/message/R3UETKPUB3V5JS5TLZOF3SMTGT5K5APS/
- https://lists.fedoraproject.org/archives/list/[email protected]/message/ULQQONMSCQSH5Z5OWFFQHCGEZ3NL4DRJ/
- https://github.com/advisories/GHSA-mr45-rx8q-wcm9
Blast Radius: 33.4
Affected Packages
go:github.com/nats-io/nats-server/v2
Dependent packages: 6,417Dependent repositories: 24,884
Downloads:
Affected Version Ranges: >= 2.10.0, <= 2.10.3
Fixed in: 2.10.4
All affected versions: 2.10.0, 2.10.1, 2.10.2, 2.10.3
All unaffected versions: 2.0.0, 2.0.2, 2.0.4, 2.1.0, 2.1.2, 2.1.4, 2.1.6, 2.1.7, 2.1.8, 2.1.9, 2.2.0, 2.2.1, 2.2.2, 2.2.3, 2.2.4, 2.2.5, 2.2.6, 2.3.0, 2.3.1, 2.3.2, 2.3.3, 2.3.4, 2.4.0, 2.5.0, 2.6.0, 2.6.1, 2.6.2, 2.6.3, 2.6.4, 2.6.5, 2.6.6, 2.7.0, 2.7.1, 2.7.2, 2.7.3, 2.7.4, 2.8.0, 2.8.1, 2.8.2, 2.8.3, 2.8.4, 2.9.0, 2.9.1, 2.9.2, 2.9.3, 2.9.4, 2.9.5, 2.9.6, 2.9.7, 2.9.8, 2.9.9, 2.9.10, 2.9.11, 2.9.12, 2.9.14, 2.9.15, 2.9.16, 2.9.17, 2.9.18, 2.9.19, 2.9.20, 2.9.21, 2.9.22, 2.9.23, 2.9.24, 2.9.25, 2.10.4, 2.10.5, 2.10.6, 2.10.7, 2.10.8, 2.10.9, 2.10.10, 2.10.11, 2.10.12, 2.10.14
go:github.com/nats-io/nkeys
Dependent packages: 6,018Dependent repositories: 28,527
Downloads:
Affected Version Ranges: >= 0.4.0, <= 0.4.5
Fixed in: 0.4.6
All affected versions: 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.4.4, 0.4.5
All unaffected versions: 0.0.1, 0.0.2, 0.1.0, 0.1.2, 0.1.3, 0.1.4, 0.2.0, 0.3.0, 0.4.6, 0.4.7