Buffer overflow in Ultravnc Tabbed Viewer
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v2 metric
CVSS v2 base score 9.0 (High). Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.680 (99.3th percentile), scored .
High probability of exploitation in the next 30 days — patch promptly. 99th percentile — 99.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.674 · newest: 0.680 · change: +0.006
Affected products
- Ultravnc Tabbed Viewer — versions 1.29
- Ultravnc Vnc Viewer — versions 1.0.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- www.exploit-db.com/exploits/1642 (exploit)
- exchange.xforce.ibmcloud.com/vulnerabilities/25648 (vdb-entry)
- www.exploit-db.com/exploits/1643 (exploit)
- exchange.xforce.ibmcloud.com/vulnerabilities/25650 (vdb-entry)
- secunia.com/advisories/19513 (Vendor Advisory, third-party-advisory)
- www.securityfocus.com/archive/1/430711/100/0/threaded (mailing-list)
- www.securityfocus.com/archive/1/430287/100/0/threaded (mailing-list)
- www.vupen.com/english/advisories/2006/1240 (vdb-entry, Vendor Advisory)
- securityreason.com/securityalert/674 (third-party-advisory)
- www.securityfocus.com/archive/1/429930/100/0/threaded (mailing-list)
Frequently asked questions
- What is CVE-2006-1652?
- CVE-2006-1652 is a vulnerability in Ultravnc Tabbed Viewer, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2006-04-06.
- Is CVE-2006-1652 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.