Vulnerability CVE-2002-1336
Published: 2002-12-11   Modified: 2012-02-12

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.

CVSS2 => (AV:N/AC:L/Au:N/C:P/I:P/A:P)

CVSS Base Score
Impact Subscore
Exploitability Subscore
7.5/10
6.4/10
10/10
Exploit range
Attack complexity
Authentication
Remote
Low
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
Partial
Affected software
Tightvnc -> Tightvnc 

 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
http://xforce.iss.net/xforce/xfdb/5992
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