VDB-90948 · CVE-2016-5673 · VU#735416

UltraVNC Repeater prior 1300 access control

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in UltraVNC Repeater and classified as critical. Affected by this vulnerability is an unknown functionality. The manipulation with the input :: results in access control. This vulnerability was named CVE-2016-5673. The attack may be performed from remote. There is no available exploit. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in UltraVNC Repeater (Connectivity Software). Affected is an unknown code. The manipulation with the input value :: leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

UltraVNC Repeater before 1300 does not restrict destination IP addresses or TCP ports, which allows remote attackers to obtain open-proxy functionality by using a :: substring in between the IP address and port number.

The weakness was presented 08/25/2016 (Website). The advisory is shared for download at kb.cert.org. This vulnerability is traded as CVE-2016-5673 since 06/16/2016. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 1300 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at SecurityFocus (BID 92348†). Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Connectivity Software

Vendor

UltraVNC

Name

Repeater

License

open-source

CPE 2.3info

🔍

CPE 2.2info

🔍

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Access control
CWE: CWE-284 / CWE-266
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Repeater 1300

Timelineinfo

06/16/2016 🔍
08/08/2016 +53 days 🔍
08/25/2016 +17 days 🔍
08/25/2016 +0 days 🔍
08/26/2016 +1 days 🔍
11/02/2024 +2990 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-5673 (🔍)
GCVE (CVE): GCVE-0-2016-5673
GCVE (VulDB): GCVE-100-90948
CERT: 🔍
SecurityFocus: 92348 - UltraVNC CVE-2016-5673 Security Bypass Vulnerability

Entryinfo

Created: 08/26/2016 09:09
Updated: 11/02/2024 09:43
Changes: 08/26/2016 09:09 (49), 04/04/2019 09:29 (13), 11/02/2024 09:43 (19)
Complete: 🔍
Cache ID: 216:63F:103