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CVE-2009-0388

10.0 · HIGH

Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly e…

Published Feb 4, 2009tightvncCWE-189EPSS 13.33%

Overview

CVE-2009-0388 is a high-severity vulnerability affecting tightvnc tightvnc. It was published on February 4, 2009 and has a CVSS 2.0 base score of 10.0 (HIGH).

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9 allow remote VNC servers to cause a denial of service (heap corruption and application crash) or possibly execute arbitrary code via a large length value in a message, related to the (a) ClientConnection::CheckBufferSize and (b) ClientConnection::CheckFileZipBufferSize functions in ClientConnection.cpp.

Remediation

Check the references section for vendor advisories and patches from tightvnc. Update tightvnc to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refforum.ultravnc.info/viewtopic.php?t=14654Refsecunia.com/advisories/33807Refvnc-tight.svn.sourceforge.net/viewvc/vnc-tight?view=rev&revision=3564Refwww.coresecurity.com/content/vnc-integer-overflowsRefwww.securityfocus.com/archive/1/500632/100/0/threadedRefwww.securityfocus.com/bid/33568Refwww.vupen.com/english/advisories/2009/0321Refwww.vupen.com/english/advisories/2009/0322Refwww.exploit-db.com/exploits/7990Refwww.exploit-db.com/exploits/8024

How CyberStrike helps

Frequently asked questions

What is CVE-2009-0388?

CVE-2009-0388 is a high-severity vulnerability affecting tightvnc tightvnc. It was published on February 4, 2009 and has a CVSS 2.0 base score of 10.0 (HIGH).

How severe is CVE-2009-0388?

This vulnerability has a CVSS 2.0 base score of 10.0, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2009-0388?

Check the references section for vendor advisories and patches from tightvnc. Update tightvnc to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2009-0388?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2009-0388 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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