What’s Vulnerable › Vulnerabilities

CVE-2002-1336

• Severity: high (CVSS 7.5 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2002-12-11 · updated 2026-06-16

Description

TightVNC before 1.2.6 generates the same challenge string for multiple connections, which allows remote attackers to bypass VNC authentication by sniffing the challenge and response of other users.

Affected products

• Kaspersky TightVNC: 1.2.0, 1.2.1, 1.2.3, 1.2.4, 1.2.5

References

• http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000640
• http://marc.info/?l=bugtraq&m=102753170201524&w=2
• http://marc.info/?l=bugtraq&m=102769183913594&w=2
• http://www.mandrakesoft.com/security/advisories?name=MDKSA-2003:022
• http://www.redhat.com/support/errata/RHSA-2002-287.html
• http://www.redhat.com/support/errata/RHSA-2003-041.html
• http://www.securityfocus.com/bid/5296
• http://www.tightvnc.com/WhatsNew.txt
• https://exchange.xforce.ibmcloud.com/vulnerabilities/5992
• http://distro.conectiva.com.br/atualizacoes/?id=a&anuncio=000640
• http://marc.info/?l=bugtraq&m=102753170201524&w=2
• http://marc.info/?l=bugtraq&m=102769183913594&w=2

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