Privilege escalation in ServiceNow

1) Code Injection

EUVDB-ID: #VU71120

Risk: Medium

CVSSv3.1: 7.7 [CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-7748

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

Exploit availability: No

Description

The vulnerability allows a remote user to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation when processing data passed via the "sysparm_media" parameter to "/report_viewer.do" endpoint. A remote user can send a specially crafted HTTP request and execute arbitrary code on the target system.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

ServiceNow: Jakarta - Jakarta Patch 8

External links

http://telekomsecurity.github.io/2018/07/servicenow-privilege-escalation.html
http://telekomsecurity.github.io/assets/advisories/20180104_ServiceNow_GlideInjection.txt

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.