Webmin and Usermin session ID spoofing root access

webmin-usermin-root-access (11390)

High 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:

• BugTraq Mailing List, Mon Feb 24 2003 - 06:45:43 CST : Webmin 1.050 - 1.060 remote exploit.
• CIAC Information Bulletin N-058: Vulnerabilities in Webmin/Usermin.
• CIAC Information Bulletin N-058: Vulnerabilities in Webmin/Usermin [REVISED 7 July 2004].
• CIAC Information Bulletin N-106: SGI Websetup/Webmin Security Vulnerability.
• EnGarde Secure Linux Security Advisory ESA-20030225-0: WebTool session ID spoofing vulnerability.. (From LinuxSecurity archive)
• Gentoo Linux Security Announcement 200302-14: usermin -- unauthorized access.
• Gentoo Linux Security Announcement 200302-14: webmin -- unauthorized access.
• Hewlett-Packard Company Security Bulletin HPSBUX0303-250: SSRT3523 Sec. Vulnerability in Webmin/Usermin. (From Neohapsis archive)
• SCO Security Advisory CSSA-2003-035.0: OpenLinux: Webmin/Usermin Session ID Spoofing Vulnerability.
• SGI Security Advisory 20030602-01-I: WebSetup / WebMin Security Vulnerability.
• SNS Advisory No.62: Webmin/Usermin Session ID Spoofing Vulnerability "Episode 2".
• Webmin Web site: Updates to Webmin.
• Webmin-Announce Mailing List, 2003-02-22 1:39:16: Webmin version 1.070 released - fixes security hole.
• BID-6915: Webmin/Usermin Session ID Spoofing Unauthenticated Access Vulnerability
• CVE-2003-0101: miniserv.pl in (1) Webmin before 1.070 and (2) Usermin before 1.000 does not properly handle metacharacters such as line feeds and carriage returns (CRLF) in Base-64 encoded strings during Basic authentication, which allows remote attackers to spoof a session ID and gain root privileges.
• DSA-319: webmin -- session ID spoofing
• MDKSA-2003:025: Updated webmin packages fix session ID spoofing vulnerability
• OSVDB ID: 10803: Webmin/Usermin miniserv.pl Base-64 String Metacharacter Handling Session Spoofing
• SA8115: Webmin Authentication Bypass Vulnerability
• SECTRACK ID: 1006160: Webmin Input Validation Flaw in `miniserv.pl` May Let Remote Users Spoof Session IDs and Gain Root Access

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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