CVE-2023-25806: amazon opensearch Observable Timing Discrepancy

Vulnerability summary

CVE-2023-25806 is a medium (CVSS 5.3) Observable Timing Discrepancy vulnerability in amazon opensearch. EPSS estimates a 0.33% chance of exploitation in the next 30 days, higher than 24.3% of scored vulnerabilities.

Timeline

1. 02-03-2023
   PublishedVulnerability first disclosed.
2. 05-03-2025
   Last modifiedVulnerability information updated.

Description

OpenSearch Security is a plugin for OpenSearch that offers encryption, authentication and authorization. There is an observable discrepancy in the authentication response time between calls where the user provided exists and calls where it does not. This issue only affects calls using the internal basic identity provider (IdP), and not other externally configured IdPs. Patches were released in versions 1.3.9 and 2.6.0, there are no workarounds.

• CWE-208Observable Timing DiscrepancyTwo separate operations in a product require different amounts of time to complete, in a way that is observable to an actor and reveals security-relevant information about the state of the product, such as whether a particular operation was successful or not.
• CWE-203Observable DiscrepancyThe product behaves differently or sends different responses under different circumstances in a way that is observable to an unauthorized actor.