Multiple vulnerabilities in Schneider Electric APC Easy UPS On-Line

Published: 2020-08-12 | Updated: 2020-08-17

Risk	Medium
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2020-7521 CVE-2020-7522
CWE-ID	CWE-22
Exploitation vector	Network
Public exploit	N/A
Vulnerable software Subscribe	APC Easy UPS On-Line Hardware solutions / Other hardware appliances
Vendor	Schneider Electric

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

Updated: 17.08.2020

Added links to ZDI advisories.

1) Path traversal

EUVDB-ID: #VU45634

Risk: Medium

CVSSv3.1: 8.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-7521

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 perform directory traversal attacks.

The vulnerability exists due to input validation error when processing directory traversal sequences in the "FileUploadServlet" method. A remote attacker can send a specially crafted HTTP request and upload executable files to non-specified directories.

Note: This vulnerability affects the following versions of APC Easy UPS On-Line Software:

SFAPV9601 v2.0 and earlier

Mitigation

Install update from vendor's website.

Vulnerable software versions

APC Easy UPS On-Line: 2.0

External links

http://ics-cert.us-cert.gov/advisories/icsa-20-224-02
http://www.se.com/ww/en/download/document/SEVD-2020-224-04/
http://www.zerodayinitiative.com/advisories/ZDI-20-1006/

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?

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

2) Path traversal

EUVDB-ID: #VU45635