CVE-2023-51437

Apache Pulsar: Timing attack in SASL token signature verification

Published Feb 7, 2024 CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
Description
Observable timing discrepancy vulnerability in Apache Pulsar SASL Authentication Provider can allow an attacker to forge a SASL Role Token that will pass signature verification.
Users are recommended to upgrade to version 2.11.3, 3.0.2, or 3.1.1 which fixes the issue. Users should also consider updating the configured secret in the `saslJaasServerRoleTokenSignerSecretPath` file.

Any component matching an above version running the SASL Authentication Provider is affected. That includes the Pulsar Broker, Proxy, Websocket Proxy, or Function Worker.

2.11 Pulsar users should upgrade to at least 2.11.3.
3.0 Pulsar users should upgrade to at least 3.0.2.
3.1 Pulsar users should upgrade to at least 3.1.1.
Any users running Pulsar 2.8, 2.9, 2.10, and earlier should upgrade to one of the above patched versions.

For additional details on this attack vector, please refer to https://codahale.com/a-lesson-in-timing-attacks/ .

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-0609 Observable timing discrepancy vulnerability in Apache Pulsar SASL Authentication Provider can allow an attacker to forge a SASL Role Token that will pass signature verification. Users are recommended to upgrade to version 2.11.3, 3.0.2, or 3.1.1 which fixes the issue. Users should also consider updating the configured secret in the `saslJaasServerRoleTokenSignerSecretPath` file. Any component matching an above version running the SASL Authentication Provider is affected. That includes the Pulsar Broker, Proxy, Websocket Proxy, or Function Worker. 2.11 Pulsar users should upgrade to at least 2.11.3. 3.0 Pulsar users should upgrade to at least 3.0.2. 3.1 Pulsar users should upgrade to at least 3.1.1. Any users running Pulsar 2.8, 2.9, 2.10, and earlier should upgrade to one of the above patched versions. For additional details on this attack vector, please refer to https://codahale.com/a-lesson-in-timing-attacks/ .
Github GHSA Github GHSA GHSA-c57v-4vg5-cm2x Apache Pulsar SASL Authentication Provider observable timing discrepancy vulnerability
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Aug 2, 2024, 10:32 PM
Reserved
Dec 19, 2023, 6:13 AM
Status
Modified
Published
Feb 7, 2024, 10:15 AM
Modified
Jun 17, 2026, 6:40 AM