AT&T WinVNC 3.3.3r7 GET Request memory corruption

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.
9.7$0-$5k0.00

A vulnerability classified as very critical was found in AT&T WinVNC 3.3.3r7. This vulnerability affects some unknown functionality of the component GET Request Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. The CWE definition for the vulnerability is CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

Buffer overflow in AT&T WinVNC (Virtual Network Computing) server 3.3.3r7 and earlier allows remote attackers to execute arbitrary commands via a long HTTP GET request when the DebugLevel registry key is greater than 0.

The weakness was released 05/03/2001 with Core as confirmed advisory (CERT.org). The advisory is available at kb.cert.org. This vulnerability was named CVE-2001-0168. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 12/22/2024).

It is declared as highly functional. The commercial vulnerability scanner Qualys is able to test this issue with plugin 38022 (ATT WinVNC Server Buffer Overflow and Weak Authentication Vulnerabilities).

It is possible to mitigate the problem by applying the configuration setting DebugLevel = 0.

The vulnerability is also documented in the databases at X-Force (6026), SecurityFocus (BID 2306†) and Vulnerability Center (SBV-6524†). Entry connected to this vulnerability is available at VDB-16605. Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.7

VulDB Base Score: 10.0
VulDB Temp Score: 9.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock
unlockunlockunlockunlockunlockunlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Highly functional

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Dayunlockunlockunlockunlock
Todayunlockunlockunlockunlock

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: winvnc_http_get.rb
MetaSploit Name: UltraVNC 1.0.2 Client (vncviewer.exe) Buffer Overflow
MetaSploit File: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Config
Status: 🔍

0-Day Time: 🔍

Config: DebugLevel = 0
McAfee IPS: 🔍
McAfee IPS Version: 🔍

ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

01/29/2001 🔍
05/03/2001 +94 days 🔍
05/03/2001 +0 days 🔍
05/03/2001 +0 days 🔍
12/15/2004 +1322 days 🔍
07/03/2014 +3487 days 🔍
12/22/2024 +3825 days 🔍

Sourcesinfo

Advisory: kb.cert.org
Organization: Core
Status: Confirmed

CVE: CVE-2001-0168 (🔍)
CERT: 🔍
X-Force: 6026
SecurityFocus: 2306 - AT&T WinVNC Server Buffer Overflow Vulnerability
Vulnerability Center: 6524 - Buffer Overflow in AT\x26T WinVNC Server 3.3.3 r7 via HTTP GET Request, High

See also: 🔍

Entryinfo

Created: 07/03/2014 05:06 PM
Updated: 12/22/2024 07:45 PM
Changes: 07/03/2014 05:06 PM (67), 05/27/2019 02:11 PM (3), 12/22/2024 07:45 PM (16)
Complete: 🔍
Cache ID: 18:6AE:40

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Want to stay up to date on a daily basis?

Enable the mail alert feature now!