Quantum Secular Labs / Blog / Advisories
CVE-2016-9814: Simplesamlphp: Denial of service
CVE-2016-9814 is rated critical with a CVSS v3.0 base score of 9.1 and affects Simplesamlphp. Per its scoring, it can be exploited over the network, without authentication, without any user interaction.
Vulnerability description
The validateSignature method in the SAML2\Utils class in SimpleSAMLphp before 1.14.10 and simplesamlphp/saml2 library before 1.9.1, 1.10.x before 1.10.3, and 2.x before 2.3.3 allows remote attackers to spoof SAML responses or possibly cause a denial of service (memory consumption) by leveraging improper conversion of return values to boolean.
Severity breakdown
CVSS v3.0 9.1: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
- Attack complexity: Low. No special conditions; the attack can be repeated reliably.
- Privileges required: None. No account or prior access is needed.
- User interaction: None. No action from any user is needed.
- Scope: Unchanged. Impact stays within the vulnerable component.
- Confidentiality impact: None. No loss of confidentiality.
- Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
- Availability impact: High. Total loss of availability; the component can be shut down.
Affected products
- Simplesamlphp: up to and including 1.14.9; 1.10
- Simplesamlphp Saml2: up to and including 1.9; 1.10; 1.10.1; 1.10.2; 2.0.0; 2.0.1; 2.1; 2.2; 2.3; 2.3.1; 2.3.2