PT-2006-2647 · Ultravnc · Ultravnc

Luigi Auriemma · Published 2006-04-06 · Updated 2018-10-18 · CVE-2006-1652

Positive Technologies (AI Summary)

CVSS v2.0

9.0

High

Base vector

AV:N/AC:L/Au:S/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions: UltraVNC versions 1.0.1 and earlier tabbed viewer version 1.29

Description: The issue concerns buffer overflows that can be triggered by a malicious server sending a long string to a client connected on TCP port 5900, causing an overflow in Log::ReallyPrint and potentially allowing remote attackers to execute arbitrary code. Additionally, a long HTTP GET request to TCP port 5800 can trigger an overflow in VNCLog::ReallyPrint, leading to a denial of service (server crash).

Recommendations: For UltraVNC versions 1.0.1 and earlier, consider disabling the Log::ReallyPrint function until a patch is available. For tabbed viewer version 1.29, restrict access to TCP port 5800 to minimize the risk of exploitation. As a temporary workaround, consider disabling the VNCLog::ReallyPrint function in tabbed viewer until a patch is available.

Exploit

Fix

Buffer Overflow

Weakness Enumeration

CWE-119

Related Identifiers

CVE-2006-1652

Affected Products

Ultravnc

References · 17

• 🔥 https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/vnc/ultravnc_client.rb · Exploit
• 🔥 http://securityfocus.com/bid/17378 · Exploit
• 🔥 https://exploit-db.com/exploits/1643 · Exploit
• 🔥 https://exploit-db.com/exploits/27568 · Exploit
• 🔥 https://exploit-db.com/exploits/27569 · Exploit
• 🔥 https://exploit-db.com/exploits/1642 · Exploit
• 🔥 https://exploit-db.com/exploits/16490 · Exploit
• http://secunia.com/advisories/19513 · Vendor Advisory
• http://vupen.com/english/advisories/2006/1240 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2006-1652 · Security Note
• https://exchange.xforce.ibmcloud.com/vulnerabilities/25648 · Note
• http://lists.grok.org.uk/pipermail/full-disclosure/2006-April/044901.html · Note
• http://securityfocus.com/archive/1/430711/100/0/threaded · Note
• https://exchange.xforce.ibmcloud.com/vulnerabilities/25650 · Note
• http://securityfocus.com/archive/1/429930/100/0/threaded · Note