CVE-2024-1735 in armeria-saml
Summary
by MITRE • 02/26/2024
A vulnerability has been identified in armeria-saml versions less than 1.27.2, allowing the use of malicious SAML messages to bypass authentication. All users who rely on armeria-saml older than version 1.27.2 must upgrade to 1.27.2 or later.
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Analysis
by VulDB Data Team • 06/12/2024
The vulnerability identified as CVE-2024-1735 represents a critical authentication bypass flaw within the armeria-saml library, which is widely utilized for implementing SAML (Security Assertion Markup Language) authentication mechanisms in enterprise applications. This vulnerability specifically affects versions prior to 1.27.2 and creates a significant security risk by allowing malicious actors to craft specially formatted SAML messages that can circumvent the intended authentication controls. The flaw resides in the library's processing of SAML assertions and responses, where insufficient validation mechanisms permit crafted payloads to be accepted as legitimate authentication tokens.
The technical implementation of this vulnerability stems from inadequate input sanitization and validation within the SAML message processing pipeline of armeria-saml. When the library processes incoming SAML assertions, it fails to properly validate certain attributes or parameters that should be strictly enforced during authentication flows. This weakness enables attackers to manipulate specific fields within SAML messages such as issuer identifiers, assertion conditions, or authentication context values. The vulnerability aligns with CWE-295 which addresses improper certificate validation and CWE-287 which covers improper authentication mechanisms. Attackers can exploit this flaw by generating malicious SAML responses that contain forged issuer information or modified assertion validity periods, effectively allowing unauthorized access to protected resources.
The operational impact of CVE-2024-1735 extends beyond simple unauthorized access, as it fundamentally compromises the integrity of the authentication system. Organizations utilizing vulnerable versions of armeria-saml may experience unauthorized system access, data breaches, and potential lateral movement within their networks. The vulnerability's exploitation can lead to privilege escalation scenarios where attackers gain access to sensitive administrative functions or confidential data that should be restricted to authorized personnel only. From an attacker's perspective, this vulnerability maps to ATT&CK technique T1566 which involves phishing campaigns and credential manipulation, as well as T1078 which covers valid accounts usage. The impact is particularly severe for organizations that rely on SAML-based single sign-on implementations, as the flaw undermines the entire trust model that SAML is designed to establish.
Organizations must immediately prioritize the upgrade of their armeria-saml dependencies to version 1.27.2 or later to remediate this vulnerability. This upgrade process should be accompanied by comprehensive testing to ensure that existing SAML configurations continue to function correctly after the patch is applied. System administrators should also implement monitoring solutions to detect any anomalous authentication patterns that might indicate exploitation attempts. Additional mitigations include implementing network-level controls to restrict access to SAML endpoints, deploying intrusion detection systems that can identify malformed SAML messages, and conducting thorough security assessments of all applications that utilize the affected library. The vulnerability serves as a reminder of the critical importance of maintaining up-to-date security libraries and the potential consequences of relying on outdated software components that may contain known security flaws.