Directory traversal in SAP NetWeaver Application Server

1) Path traversal

EUVDB-ID: #VU7695

Risk: High

CVSSv4.0: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:A/U:Amber]

CVE-ID: CVE-2017-12637

CWE-ID: CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Exploit availability: No

Description

The vulnerability allows a remote attacker to read arbitrary files on the vulnerable system.

The vulnerability exists due to improper input validation in scheduler/ui/js/ffffffffbca41eb4/UIUtilJavaScriptJS  component in SAP NetWeaver Application Server Java 7.5. A remote unauthenticated attacker can use directory traversal sequences (e.g. "../") to read contents of arbitrary file on vulnerable system.

Successful exploitation of this vulnerability may allow an attacker to gain acces to potentially sensitive information.

Note: there are reports that this vulnerability is being active exploited in the wild in August 2017.

Mitigation

Cybersecurity Help is currenlty unaware of any official solution to address this vulnerability.

Vulnerable software versions

SAP NetWeaver: 7.50

CPE2.3

• cpe:2.3:a:sap:sap_netweaver:7.50:*:*:*:*:*:*:*

External links

https://nvd.nist.gov/vuln/detail/CVE-2017-12637
https://www.sh0w.top/index.php/archives/7/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.