A denial of service vulnerability exists in the lasso_node_init_from_message_with_format functionality of Entr&#39;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 remote Ubuntu 22.04 LTS / 24.04 LTS / 25.04 host has packages installed that are affected by multiple vulnerabilities as referenced in the USN-7872-1 advisory.

    It was discovered that Lasso incorrectly handled certain malformed SAML responses. A remote attacker could     possibly use this issue to cause Lasso to crash, resulting in a denial of service. (CVE-2025-46404)

    It was discovered that Lasso incorrectly handled certain malformed SAML assertion responses. A remote     attacker could possibly use this issue to cause Lasso to crash, resulting in a denial of service.
    (CVE-2025-46705)

    It was discovered that Lasso incorrectly handled certain malformed SAML responses. A remote attacker could     possibly use this issue to cause Lasso to consume memory, resulting in a denial of service. This issue     only affected Ubuntu 22.04 LTS. (CVE-2025-46784)

    It was discovered that Lasso incorrectly handled certain malformed SAML responses. A remote attacker could     use this issue to cause Lasso to crash, resulting in a denial of service, or possibly execute arbitrary     code. (CVE-2025-47151)

Tenable has extracted the preceding description block directly from the Ubuntu security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES12 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:4094-1 advisory.

    - CVE-2025-46784: Fixed memory exhaustion in Entr'ouvert Lasso (bsc#1253094)
    - CVE-2025-46404: Fixed denial of service in Entr'ouvert Lasso (bsc#1253092)
    - CVE-2025-46705: Fixed denial of service in Entr'ouvert Lasso (bsc#1253093)
    - CVE-2025-47151: Fixed type confusion vulnerability in the       lasso_node_impl_init_from_xml functionality (bsc#1253095)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote SUSE Linux SLES15 / SLES_SAP15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2025:4090-1 advisory.

    - CVE-2025-46784: Fixed memory exhaustion in Entr'ouvert Lasso (bsc#1253094)
    - CVE-2025-46404: Fixed denial of service in Entr'ouvert Lasso (bsc#1253092)
    - CVE-2025-46705: Fixed denial of service in Entr'ouvert Lasso (bsc#1253093)
    - CVE-2025-47151: Fixed type confusion vulnerability in the       lasso_node_impl_init_from_xml functionality (bsc#1253095)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

An update of the lasso package has been released.

The version of lasso installed on the remote host is prior to 2.9.0-1. It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2-2025-3077 advisory.

    A denial of service vulnerability exists in the lasso_provider_verify_saml_signature functionality of     Entr'ouvert Lasso 2.5.1. A specially crafted SAML response can lead to a denial of service. An     attacker can send a malformed SAML response to trigger this vulnerability. (CVE-2025-46404)

    A denial of service vulnerability exists in the g_assert_not_reached functionality of Entr'ouvert     Lasso 2.5.1 and 2.8.2. A specially crafted SAML assertion response can lead to a denial of service. An     attacker can send a malformed SAML response to trigger this vulnerability. (CVE-2025-46705)

    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.
    (CVE-2025-46784)

    A type confusion vulnerability exists in the lasso_node_impl_init_from_xml functionality of     Entr'ouvert Lasso 2.5.1 and 2.8.2. A specially crafted SAML response can lead to an arbitrary code     execution. An attacker can send a malformed SAML response to trigger this vulnerability. (CVE-2025-47151)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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.
    (CVE-2025-46784)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
275817	Ubuntu 22.04 LTS / 24.04 LTS / 25.04 : Lasso vulnerabilities (USN-7872-1)	Nessus	Ubuntu Local Security Checks	critical
275506	SUSE SLES12 Security Update : lasso (SUSE-SU-2025:4094-1)	Nessus	SuSE Local Security Checks	critical
275409	SUSE SLES15 Security Update : lasso (SUSE-SU-2025:4090-1)	Nessus	SuSE Local Security Checks	critical
275313	Photon OS 5.0: Lasso PHSA-2025-5.0-0674	Nessus	PhotonOS Local Security Checks	critical
275308	Photon OS 4.0: Lasso PHSA-2025-4.0-0903	Nessus	PhotonOS Local Security Checks	critical
274680	Amazon Linux 2 : lasso, --advisory ALAS2-2025-3077 (ALAS-2025-3077)	Nessus	Amazon Linux Local Security Checks	critical
274083	Linux Distros Unpatched Vulnerability : CVE-2025-46784	Nessus	Misc.	high

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CVE-2025-46784

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