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TI-2009-00368 Aliases CVE-2009-0388GHSA-j23w-r722-rm78

Multiple integer signedness errors in (1) UltraVNC 1.0.2 and 1.0.5 and (2) TightVnc 1.3.9…

Priority MEDIUM 58CWE-189Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
— Not recorded in CVSS 2.0
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
Complete · Complete · Complete
Fix status
No fix listed

Attack profile from CVSS 2.0 · NVD. Fix status from CNA. Impact type from CWE-189 and the CVSS impact.

Summary

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.

Why it matters now

EPSS 0.13334 96th percentileScored 2026-11-07
Public exploit Yes 3 exploit referencesTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:tightvnc:tightvnc:1.3.9:*:*:*:*:*:*:*1.3.9VulnerableTightvnc
cpe:2.3:a:ultravnc:ultravnc:1.0.2:*:*:*:*:*:*:*1.0.2VulnerableUltraVNC
cpe:2.3:a:ultravnc:ultravnc:1.0.5:*:*:*:*:*:*:*1.0.5VulnerableUltraVNC
  • cpe:2.3:a:tightvnc:tightvnc:1.3.9:*:*:*:*:*:*:* Versions 1.3.9 Vulnerable ·Tightvnc
  • cpe:2.3:a:ultravnc:ultravnc:1.0.2:*:*:*:*:*:*:* Versions 1.0.2 Vulnerable ·UltraVNC
  • cpe:2.3:a:ultravnc:ultravnc:1.0.5:*:*:*:*:*:*:* Versions 1.0.5 Vulnerable ·UltraVNC

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2009-0388
  2. 2026-10-03 Alias added: GHSA-j23w-r722-rm78

References

Exploit 3

Other 4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences