Path traversal in Cisco Unified Communications Manager (UCM) and Unified Communications Manager Session Management Edition (SME)

1) Path traversal

EUVDB-ID: #VU26981

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-3177

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 Tool for Auto-Registered Phones Support (TAPS). A remote attacker can send a specially crafted HTTP request and read arbitrary files on the system.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Unified Communications Manager (CallManager): 10.5 - 12.5

Cisco Unified Communications Manager Session Management Edition: 10.5 - 12.5

External links

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-cucm-taps-path-trav-pfsFO93r

Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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