PT-2016-6630 · Ultravnc · Ultravnc Repeater

Dan Tentler + 1 · Published 2016-08-25 · Updated 2016-11-28 · CVE-2016-5673

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Name of the Vulnerable Software and Affected Versions UltraVNC Repeater versions prior to 1300

Description The issue allows remote attackers to obtain open-proxy functionality. This is achieved by using a :: substring in between the IP address and port number, as the software does not restrict destination IP addresses or TCP ports.

Recommendations For versions prior to 1300, restrict destination IP addresses and TCP ports to prevent open-proxy functionality. As a temporary workaround, consider restricting access to the repeater functionality until a patch is available.

Fix

Improper Access Control

Weakness Enumeration

CWE-284

Related Identifiers

CVE-2016-5673

Affected Products

Ultravnc Repeater

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2016-5673 · Security Note
• https://osv.dev/vulnerability/CVE-2016-5673 · Vendor Advisory
• http://kb.cert.org/vuls/id/735416 · Note
• http://securityfocus.com/bid/92348 · Note
• http://kb.cert.org/vuls/id/BLUU-A9WQVP · Note