#VU22596 Reachable Assertion in SimpleSAMLphp and XMLSecLibs - CVE-2019-3465

Vulnerability identifier: #VU22596

Vulnerability risk: Medium

CVSSv4.0: 1.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-3465

CWE-ID: CWE-617

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SimpleSAMLphp
Web applications / Other software
XMLSecLibs
Universal components / Libraries / Libraries used by multiple products

Vendor: SimpleSAMLphp
Rob Richards

Description

The vulnerability allows a remote attacker to bypass authentication.

The vulnerability exists due to an assertion failure when processing signatures, related to XPath expression "./secdsig:SignedInfo/secdsig:Reference". A remote attacker with ability to retrieve IdP can impersonate any user i the application.

Successful exploitation of the vulnerability may allow an attacker to gain access to sensitive information or compromise the affected application.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SimpleSAMLphp: 1.12.0 - 1.17.6

XMLSecLibs: 1.3.2 - 3.0.3

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External links
https://simplesamlphp.org/security/201911-01

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.