Webmin and Usermin session ID spoofing root access

webmin-usermin-root-access (11390) The risk level is classified as HighHigh Risk

Description:

Webmin could allow a remote attacker to spoof a session ID (SID) and inject the SID into a Access Control List (ACL) to gain root access to the system, caused by improper filtering of user-supplied input by the miniserv.pl script. If the "password timeouts" option is enabled and a valid username is known, a remote attacker could spoof a session ID by supplying a BASE64 encoded authentication string containing CRLF (Carriage Return - Line Feed) sequences to bypass authentication and execute arbitrary commands on the system with root privileges.


Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Webmin (1.070 or later), available from the Webmin Web page. See References.

For Gentoo Linux:
Upgrade to the latest version of Webmin (1.070 or later) or Usermin (1.000 or later), as listed in Gentoo Linux Security Announcement 200302-14. See References.

For Mandrake Linux:
Upgrade to the latest webmin package, as listed below. Refer to MandrakeSoft Security Advisory MDKSA-2003:025:webmin for more information. See References.

Mandrake Linux 7.2 and Single Network Firewall 7.2: 0.970-2.1mdk or later
Mandrake Linux 8.0: 0.970-2.2mdk or later
Mandrake Linux 8.1 and 8.2: 0.970-2.3mdk or later
Mandrake Linux 9.0: 0.990-6.1mdk or later

For EnGarde Secure Linux Community Edition:
Upgrade to the latest WebTool package (1.2-1.0.74 or later), as listed in EnGarde Secure Linux Security Advisory ESA-20030225-0. See References.

For SGI IRIX:
Upgrade to the latest version of IRIX (6.5.20 or later), when it becomes available, as listed in SGI Security Advisory 20030602-01-I. See References.

— OR —

Install the upgraded websetup package for your system, as listed in SGI Security Advisory 20030602-01-I. See References.

For Debian GNU/Linux 3.0 (woody):
Upgrade to the latest webmin package (0.94-7woody1 or later), as listed in DSA-319-1. See References.

For Caldera OpenLinux Server and Workstation 3.1.1:
Upgrade to the latest version of webmin (0.89-12 or later), as listed in SCO Security Advisory CSSA-2003-035.0. See References.

For HP-UX 11.00, 11.11, 11.20, and 11.22 :
Upgrade to the version of webmin with the security fix, as listed in Hewlett-Packard Company Security Bulletin HPSBUX0303-250. See References.

For other distributions:
Contact your vendor for upgrade or patch information.

References:

Platforms Affected:

  • Debian Debian Linux 3.0
  • EngardeLinux Secure Linux
  • Gentoo Linux
  • Gentoo Webmin prior to 1.070
  • HP HP-UX 11.00
  • HP HP-UX 11.11
  • HP HP-UX 11.20
  • HP HP-UX 11.22
  • MandrakeSoft Mandrake Linux 7.2
  • MandrakeSoft Mandrake Linux 8.0
  • MandrakeSoft Mandrake Linux 8.0 PPC
  • MandrakeSoft Mandrake Linux 8.1
  • MandrakeSoft Mandrake Linux 8.1 IA64
  • MandrakeSoft Mandrake Linux 8.2 PPC
  • MandrakeSoft Mandrake Linux 8.2
  • MandrakeSoft Mandrake Linux 9.0
  • MandrakeSoft Mandrake Single Network Firewall 7.2
  • SCO Caldera OpenLinux Server 3.1.1
  • SCO Caldera OpenLinux Workstation 3.1.1
  • SGI IRIX 6.5
  • SGI IRIX 6.5 20
  • SGI IRIX 6.5.1
  • SGI IRIX 6.5.10
  • SGI IRIX 6.5.10f
  • SGI IRIX 6.5.10m
  • SGI IRIX 6.5.11
  • SGI IRIX 6.5.11f
  • SGI IRIX 6.5.11m
  • SGI IRIX 6.5.12
  • SGI IRIX 6.5.12f
  • SGI IRIX 6.5.12m
  • SGI IRIX 6.5.13
  • SGI IRIX 6.5.13f
  • SGI IRIX 6.5.13m
  • SGI IRIX 6.5.14
  • SGI IRIX 6.5.14f
  • SGI IRIX 6.5.14m
  • SGI IRIX 6.5.15
  • SGI IRIX 6.5.15f
  • SGI IRIX 6.5.15m
  • SGI IRIX 6.5.16
  • SGI IRIX 6.5.16f
  • SGI IRIX 6.5.16m
  • SGI IRIX 6.5.17
  • SGI IRIX 6.5.17f
  • SGI IRIX 6.5.17m
  • SGI IRIX 6.5.18
  • SGI IRIX 6.5.18f
  • SGI IRIX 6.5.18m
  • SGI IRIX 6.5.19
  • SGI IRIX 6.5.2f
  • SGI IRIX 6.5.2m
  • SGI IRIX 6.5.3
  • SGI IRIX 6.5.3f
  • SGI IRIX 6.5.3m
  • SGI IRIX 6.5.4
  • SGI IRIX 6.5.4f
  • SGI IRIX 6.5.4m
  • SGI IRIX 6.5.5
  • SGI IRIX 6.5.5f
  • SGI IRIX 6.5.5m
  • SGI IRIX 6.5.6
  • SGI IRIX 6.5.6f
  • SGI IRIX 6.5.6m
  • SGI IRIX 6.5.7
  • SGI IRIX 6.5.7f
  • SGI IRIX 6.5.7m
  • SGI IRIX 6.5.8
  • SGI IRIX 6.5.8f
  • SGI IRIX 6.5.8m
  • SGI IRIX 6.5.9
  • SGI IRIX 6.5.9f
  • SGI IRIX 6.5.9m
  • Usermin Project Usermin prior to 1.000

Reported:

Feb 22, 2003

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