Entr'ouvert Lasso 2.5.1 SAML Response lasso_node_init_from_message_with_format memory leak

Summaryinfo

A vulnerability described as problematic has been identified in Entr'ouvert Lasso 2.5.1. This issue affects the function lasso_node_init_from_message_with_format of the component SAML Response Handler. Such manipulation leads to memory leak. This vulnerability is referenced as CVE-2025-46784. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in Entr'ouvert Lasso 2.5.1. It has been rated as problematic. Affected by this issue is the function lasso_node_init_from_message_with_format of the component SAML Response Handler. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. CVE summarizes:

A denial of service vulnerability exists in the lasso_node_init_from_message_with_format functionality of Entr'ouvert Lasso 2.5.1. A specially crafted SAML response can lead to a memory depletion, resulting in denial of service. An attacker can send a malformed SAML response to trigger this vulnerability.

The advisory is shared for download at talosintelligence.com. This vulnerability is handled as CVE-2025-46784 since 05/07/2025. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1499.

The vulnerability scanner Nessus provides a plugin with the ID 274083 (Linux Distros Unpatched Vulnerability : CVE-2025-46784), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (274083). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

• Entr'ouvert

Name

• Lasso

Version

• 2.5.1

CPE 2.3info

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CPE 2.2info

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VulDB is the best source for vulnerability data and more expert information about this specific topic.

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