TightVNC Server Authentication Cookie Predictability Vulnerability

BID:6905

Info

TightVNC Server Authentication Cookie Predictability Vulnerability

Bugtraq ID: 6905
Class: Design Error
CVE: CVE-2002-1511
Remote: Yes
Local: No
Published: Nov 15 2002 12:00AM
Updated: Jul 11 2009 08:06PM
Credit: This vulnerability was discovered and fixed by the vendor.
Vulnerable: TightVNC TightVNC 1.2.5
+ Mandriva Linux Mandrake 9.0
TightVNC TightVNC 1.2.4
TightVNC TightVNC 1.2.3
TightVNC TightVNC 1.2.2
TightVNC TightVNC 1.2.1
TightVNC TightVNC 1.2 .0
AT&T VNC 3.3.6
+ Gentoo Linux 1.4 _rc2
 + Gentoo Linux 1.4 _rc1
 AT&T VNC 3.3.5
AT&T VNC 3.3.4
AT&T VNC 3.3.3 R2
+ Conectiva Linux Enterprise Edition 1.0
+ Mandriva Linux Mandrake 8.2 ppc
 + Mandriva Linux Mandrake 8.2
+ Mandriva Linux Mandrake 8.1 ia64
 + Mandriva Linux Mandrake 8.1
+ Mandriva Linux Mandrake 8.0 ppc
 + Mandriva Linux Mandrake 8.0
- Redhat Linux 7.2 ia64
 - Redhat Linux 7.2 i686
 - Redhat Linux 7.2 i586
 - Redhat Linux 7.2 i386
 - Redhat Linux 7.2 alpha
 - Redhat Linux 7.2
- Redhat Linux 7.1 ia64
 - Redhat Linux 7.1 i686
 - Redhat Linux 7.1 i586
 - Redhat Linux 7.1 i386
 - Redhat Linux 7.1 alpha
 - Redhat Linux 7.1
- Redhat Linux 7.0 sparc
 - Redhat Linux 7.0 i686
 - Redhat Linux 7.0 i386
 - Redhat Linux 7.0 alpha
 - Redhat Linux 7.0
- Redhat Linux 6.2 sparc
 - Redhat Linux 6.2 i386
 - Redhat Linux 6.2 alpha
 - Redhat Linux 6.2
 + Sun Linux 5.0.7
+ Sun Linux 5.0
+ Sun LX50
AT&T VNC 3.3.3
- Apple Mac OS 9 9.0
- BSDI BSD/OS 4.0
- Debian Linux 2.2
- FreeBSD FreeBSD 4.2
- HP HP-UX 11.11
+ Mandriva Linux Mandrake 7.2
- Microsoft Windows 2000 Professional
- Microsoft Windows 98SE
- Microsoft Windows NT 4.0
 - OpenBSD OpenBSD 2.8
+ OpenBSD OpenBSD 2.0
- Redhat Linux 7.0
- Sun Solaris 8_sparc
 - Sun Solaris 7.0
 - SuSE Linux 7.0
Not Vulnerable: TightVNC TightVNC 1.2.7
TightVNC TightVNC 1.2.6

Exploit / POC

TightVNC Server Authentication Cookie Predictability Vulnerability

Currently we are not aware of any exploits for this issue. If you feel we are in error or are aware of more recent information, please mail us at: [email protected] <mailto:[email protected]>.

Solution / Fix

TightVNC Server Authentication Cookie Predictability Vulnerability

Solution:
Sun have made fixes available to address this issue in Sun Linux 5.0.7. Fixes are linked below.

Red Hat has released an advisory (RHSA-2003:041-12) and fixes as a solution for this vulnerability.

Gentoo Linux has released an advisory. Users who have installed net-misc/vnc or net-misc/tightvnc are advised to upgrade by issuing the following commands:

emerge sync
emerge -u tightvnc
emerge clean

or

emerge sync
emerge -u vnc
emerge clean

Conectiva has released advisory CLA-2003:640 with fixes to address this issue. Security advisory CLSA-2003:670 has also been released containing a fix for CLEE 1.0, users are advised to upgrade as soon as possible.

Fixes:


TightVNC TightVNC 1.2.2

TightVNC TightVNC 1.2.5

AT&T VNC 3.3.3

AT&T VNC 3.3.3 R2

References

TightVNC Server Authentication Cookie Predictability Vulnerability

References:

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