KDE KDM login security bypass
| kde-kdm-login-security-bypass (36711) |  Medium Risk |
Description:
KDE could allow a local attacker to bypass security restrictions, caused by an error in the KDM service. If autologin and "shutdown without password" are enabled, an attacker could exploit this vulnerability to bypass login security restrictions and gain unauthorized access to the system, possibly with root privileges.
*CVSS:
| Base Score: | 7.2 |
| Access Vector: | Local |
| Access Complexity: | Low |
| Authentication: | None |
| Confidentiality Impact: | Complete |
| Integrity Impact: | Complete |
| Availability Impact: | Complete |
| Temporal Score: | 5.3 |
| Exploitability: | Unproven |
| Remediation Level: | Official-Fix |
| Report Confidence: | Confirmed |
Consequences:
Bypass Security
Remedy:
Refer to KDE Security Advisory 20070919-1 for patch, upgrade, or suggested workaround information. See References.
For Debian GNU/Linux (kdebase):
Refer to DSA-1376-1 for patch, upgrade, or suggested workaround information. See References.
For Ubuntu Linux (kdebase):
Refer to USN-517-1 for patch, upgrade, or suggested workaround information. See References.
For Mandriva Linux (kdebase):
Refer to MDKSA-2007:190 for patch, upgrade, or suggested workaround information. See References.
For Red Hat Linux (kdebase):
Refer to RHSA-2007:0905-4 for patch, upgrade, or suggested workaround information. See References.
For other distributions:
Contact your vendor for upgrade or patch information.
References:
- KDE Security Advisory 20070919-1: KDM passwordless login vulnerability.
- KDE Web site: K Desktop Environment -Conquer your Desktop!.
- ASA-2007-413: kdebase security update (RHSA-2007-0905)
- BID-25730: KDE KDM Unspecified Password Authentication Bypass Vulnerability
- CVE-2007-4569: backend/session.c in KDM in KDE 3.3.0 through 3.5.7, when autologin is configured and shutdown with password is enabled, allows remote attackers to bypass the password requirement and login to arbitrary accounts via unspecified vectors.
- DSA-1376: kdebase -- programming error
- GLSA-200710-15: KDM: Local privilege escalation
- MDKSA-2007:190: Updated kdebase packages fix KDM vulnerability
- RHSA-2007-0905: Moderate: kdebase security update
- SA26894: KDE KDM Login Password Check Security Bypass
- SECTRACK ID: 1018724: KDE Autologin Authentication Bug May Let Remote Users Login Without a Password
- SUSE-SR:2007:021: SUSE Security Summary Report
- USN-517-1: kdm vulnerability
- VUPEN/ADV-2007-3227: KDE Display Manager Login Credentials Validation Bypass Vulnerability
Platforms Affected:
- Canonical Ubuntu 6.06 LTS
- Canonical Ubuntu 6.10
- Canonical Ubuntu 7.04
- Debian Debian Linux 4.0
- Gentoo Linux
- KDE KDE 3.3.0 - 3.5.7
- MandrakeSoft Mandrake Linux 2007
- MandrakeSoft Mandrake Linux 2007 X86_64
- MandrakeSoft Mandrake Linux 2007.1
- MandrakeSoft Mandrake Linux 2007.1 X86_64
- MandrakeSoft Mandrake Linux 2008.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 4.0 X86_64
- MandrakeSoft Mandrake Linux Corporate Server 4.0
- RedHat Enterprise Linux 4 ES
- RedHat Enterprise Linux 4 AS
- RedHat Enterprise Linux 4 WS
- RedHat Enterprise Linux 4 Desktop
- RedHat Enterprise Linux 5
- RedHat Enterprise Linux 5 Client
- RedHat Enterprise Linux 5 Client Workstation
- SUSE SuSE Linux
Reported:
Sep 19, 2007
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For corrections or additions please email xforce@iss.net
* According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an "industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response." IBM PROVIDES THE CVSS SCORES "AS IS" WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
The information within this database may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall IBM be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information.