Arbitrary user impersonation in SimpleSAMLphp and XMLSecLibs

Published: 2019-11-07 | Updated: 2019-11-07
Severity Medium
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2019-3465
CWE ID CWE-617
Exploitation vector Network
Public exploit N/A
Vulnerable software SimpleSAMLphp Subscribe
XMLSecLibs
Vendor SimpleSAMLphp
Rob Richards

Security Advisory

This security advisory describes one medium risk vulnerability.

1) Reachable Assertion

Severity: Medium

CVSSv3: 5.5 [CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2019-3465

CWE-ID: CWE-617 - Reachable Assertion

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, 1.13.0, 1.13.1, 1.13.2, 1.14.0, 1.14.1, 1.14.2, 1.14.3, 1.14.4, 1.14.5, 1.14.6, 1.14.7, 1.14.8, 1.14.9, 1.14.10, 1.14.11, 1.14.12, 1.14.13, 1.14.14, 1.14.15, 1.14.16, 1.14.17, 1.15.0, 1.15.1, 1.15.2, 1.15.3, 1.15.4, 1.16.0, 1.16.1, 1.16.2, 1.16.3, 1.17.0, 1.17.1, 1.17.2, 1.17.3, 1.17.4, 1.17.5, 1.17.6

XMLSecLibs: 1.3.2, 1.3.3, 1.3.4, 1.4.0, 1.4.1, 1.4.2, 2.0.0, 2.0.1, 2.1.0, 3.0.0, 3.0.1, 3.0.2, 3.0.3

CPE External links

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


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.



ImmuniWeb® AI Platform for Application Security Testing