Webmin and Usermin could allow an attacker to spoof a session ID

webmin-usermin-sessionid-spoof (9037) The risk level is classified as MediumMedium Risk

Description:

Webmin and Usermin could allow a remote attacker to spoof a session id and gain unauthorized access to arbitrary user's accounts. This vulnerability is caused by a communication error that occurs between the parent and child process during session ID verification. If the "password timeouts" is enabled and a valid username is known, a remote attacker could spoof a session ID and gain unauthorized access to any known user's account.


Consequences:

Gain Access

Remedy:

Upgrade to the latest version of Webmin (0.970 or later) or Usermin (0.910 or later), available from the Webmin Web site. See References.

For Mandrake Linux 7.1, 7.2, Corporate Server 1.0.1 and Single Network Firewall 7.2:
Upgrade to the latest version of Webmin(0.970-1.3mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2002:033 : webmin. See References.

For Mandrake Linux 8.0:
Upgrade to the latest version of Webmin(0.970-1.2mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2002:033 : webmin. See References.

For Mandrake Linux 8.1 and 8.2:
Upgrade to the latest version of Webmin(0.970-1.1mdk or later), as listed in MandrakeSoft Security Advisory MDKSA-2002:033 : webmin. See References.

For Caldera OpenLinux 3.1 and 3.1.1 (Workstation and Server):
Upgrade to the latest webmin package (0.89-11 or later), as listed in SCO Security Advisory CSSA-2003-002.0. See References.

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

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

References:

  • SCO Security Advisory CSSA-2003-002.0: Webmin Cross-site Scripting and Session ID Spoofing Vulnerabilities.
  • SNS Advisory No.53: Webmin/Usermin Session ID Spoofing Vulnerability.
  • Webmin Web site: Webmin.
  • BID-4700: Webmin / Usermin Authentication Bypass Vulnerability
  • CVE-2002-0757: (1) Webmin 0.96 and (2) Usermin 0.90 with password timeouts enabled allow local and possibly remote attackers to bypass authentication and gain privileges via certain control characters in the authentication information, which can force Webmin or Usermin to accept arbitrary username/session ID combinations.
  • MDKSA-2002:033: Updated webmin packages fix buffer overflow vulnerability
  • OSVDB ID: 10802: Webmin/Usermin Auth Information Control Character Bypass Arbitrary User Authentication

Platforms Affected:

  • Gentoo Webmin 0.960
  • MandrakeSoft Mandrake Linux 7.1
  • MandrakeSoft Mandrake Linux 7.2
  • MandrakeSoft Mandrake Linux 8.0
  • MandrakeSoft Mandrake Linux 8.1
  • MandrakeSoft Mandrake Linux 8.2
  • MandrakeSoft Mandrake Linux Corporate Server 1.0.1
  • MandrakeSoft Mandrake Single Network Firewall 7.2
  • SCO Caldera OpenLinux Server 3.1
  • SCO Caldera OpenLinux Server 3.1.1
  • SCO Caldera OpenLinux Workstation 3.1
  • SCO Caldera OpenLinux Workstation 3.1.1
  • Usermin Project Usermin 0.90 and prior

Reported:

May 07, 2002

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