#VU10776 XXE attack in OneLogin python-saml - CVE-2017-11427

Vulnerability identifier: #VU10776

Vulnerability risk: Low

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

CVE-ID: CVE-2017-11427

CWE-ID: CWE-611

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
OneLogin python-saml
Client/Desktop applications / Software for system administration

Vendor: Python.org

Description
The vulnerability allows a remote authenticated attacker to perform XXE attack.

The vulnerability exists due to an implementation flaw in the python-saml open-source library. A remote attacker can add or modify specially crafted XML data, modify digital signatures of user attribute data and impersonate a user or obtain potentially sensitive information.

Mitigation
Install update from vendor's website.

Vulnerable software versions

OneLogin python-saml: 1.4.0 - 2.4.0

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External links
https://github.com/onelogin/python3-saml/releases/tag/v1.4.0
https://github.com/onelogin/python-saml/releases/tag/v2.4.0

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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.