Vulnerability Report

CVE-2006-1652

Title: Ultravnc Vnc Viewer RCE

Memory Corruption

Proof Of Concept

PoC Available for CVE-2006-1652

CWE Category CWE-119
Published Date Apr 06, 2006
Modified Date Jun 16, 2026
Exploit Status Available
Score 9.0 CVSS v2.0
Exploit Probability (EPSS)
68.04%

Vulnerability Summary

CVE-2006-1652: Multiple buffer overflows in (a) UltraVNC (aka Ultr@VNC) 1.0.1 and earlier and (b) tabbed_viewer 1.29 (1) allow user-assisted remote attackers to execute arbitrary code via a malicious server that sends a long string to a client that connects on TCP port 5900, which triggers an overflow in Log::ReallyPrint; and (2) allow remote attackers to cause a denial of service (server crash) via a long HTTP GET request to TCP port 5800, which triggers an overflow in VNCLog::ReallyPrint.

Impacted Vendors

U
ultravnc 2
R
realvnc 1

Reference Links

http://lists.grok.org.uk/pipermail/full-disclosure/2006-April/044901.html http://secunia.com/advisories/19513 http://securityreason.com/securityalert/674 http://www.securityfocus.com/archive/1/429930/100/0/threaded http://www.securityfocus.com/archive/1/430287/100/0/threaded http://www.securityfocus.com/archive/1/430711/100/0/threaded http://www.securityfocus.com/bid/17378 http://www.vupen.com/english/advisories/2006/1240 https://exchange.xforce.ibmcloud.com/vulnerabilities/25648 https://exchange.xforce.ibmcloud.com/vulnerabilities/25650 https://www.exploit-db.com/exploits/1642 https://www.exploit-db.com/exploits/1643 http://lists.grok.org.uk/pipermail/full-disclosure/2006-April/044901.html http://secunia.com/advisories/19513 http://securityreason.com/securityalert/674 http://www.securityfocus.com/archive/1/429930/100/0/threaded http://www.securityfocus.com/archive/1/430287/100/0/threaded http://www.securityfocus.com/archive/1/430711/100/0/threaded http://www.securityfocus.com/bid/17378 http://www.vupen.com/english/advisories/2006/1240 https://exchange.xforce.ibmcloud.com/vulnerabilities/25648 https://exchange.xforce.ibmcloud.com/vulnerabilities/25650 https://www.exploit-db.com/exploits/1642 https://www.exploit-db.com/exploits/1643
CVSS v2.0
Source Entity [email protected]
Severity HIGH
9.0
Access Vector
N/A
Authentication
N/A
RAW VECTOR AV:N/AC:L/Au:S/C:C/I:C/A:C

Associated Attack Patterns (CAPEC)

Total: Patterns

CVE-2006-1652 Exploits & PoCs (Proof Of Concept)

Exploit-DB https://www.exploit-db.com/exploits/16490
View Code
Exploit-DB https://www.exploit-db.com/exploits/27568
View Code
Exploit-DB https://www.exploit-db.com/exploits/27569
View Code
MODIFIED

Vulnerability data updated via NVD.

MODIFIED

Vulnerability data or affected products updated.

PUBLISHED

Vulnerability first announced in NVD.

Attack Vector Matrix

Access Vector N/A
Complexity N/A
Privileges N/A
Interaction NONE
CVSS Vector String AV:N/AC:L/Au:S/C:C/I:C/A:C

Affected Stack

No specific products linked.