CVE-2009-0388

Severity: critical (CVSS 10.0 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 13.3% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2009-02-04 · updated 2026-06-16
Weakness: CWE-189

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.

Affected products

Kaspersky TightVNC: 1.3.9
Ultravnc: 1.0.2, 1.0.5

References

http://forum.ultravnc.info/viewtopic.php?t=14654
http://secunia.com/advisories/33807
http://vnc-tight.svn.sourceforge.net/viewvc/vnc-tight?view=rev&revision=3564
http://www.coresecurity.com/content/vnc-integer-overflows
http://www.securityfocus.com/archive/1/500632/100/0/threaded
http://www.securityfocus.com/bid/33568
http://www.vupen.com/english/advisories/2009/0321
http://www.vupen.com/english/advisories/2009/0322
https://www.exploit-db.com/exploits/7990
https://www.exploit-db.com/exploits/8024
http://forum.ultravnc.info/viewtopic.php?t=14654
http://secunia.com/advisories/33807

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