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.

From Red Hat Security Advisory 2007:0905 :

Updated kdebase packages that resolve several security flaws are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The kdebase packages provide the core applications for KDE, the K Desktop Environment. These core packages include Konqueror, the web browser and file manager.

These updated packages address the following vulnerabilities :

Kees Huijgen found a flaw in the way KDM handled logins when autologin and 'shutdown with password' were enabled. A local user would have been able to login via KDM as any user without requiring a password.
(CVE-2007-4569)

Two Konqueror address spoofing flaws were discovered. A malicious website could spoof the Konqueror address bar, tricking a victim into believing the page was from a different site. (CVE-2007-3820, CVE-2007-4224)

Users of KDE should upgrade to these updated packages, which contain backported patches to correct these issues.

Kees Huijgen found a flaw in the way KDM handled logins when autologin and 'shutdown with password' were enabled. A local user would have been able to login via KDM as any user without requiring a password.
(CVE-2007-4569)

Two Konqueror address spoofing flaws were discovered. A malicious website could spoof the Konqueror address bar, tricking a victim into believing the page was from a different site. (CVE-2007-3820, CVE-2007-4224)

Users could log in as root without having to enter the password if auto login was enabled and if kdm was configured to require the root passwort to shutdown the system. (CVE-2007-4569)

JavaScript code could modify the URL in the address bar to make the currently displayed website appear to come from a different site.
(CVE-2007-4224)

It was discovered that KDM would allow logins without password checks under certain circumstances. If autologin was configured, and 'shutdown with password' enabled, a local user could exploit the problem and gain root privileges.

Note that Tenable Network Security has extracted the preceding description block directly from the Ubuntu security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

- Tue Oct 2 2007 Than Ngo <than at redhat.com> -     6:3.5.7-13.1

    - rh#299731, CVE-2007-4569

    - Wed Aug 15 2007 Rex Dieter       <rdieter[AT]fedoraproject.org> 6:3.5.7-13

    - CVE-2007-3820, CVE-2007-4224, CVE-2007-4225

    - License: GPLv2

    - Requires: kdelibs3(-devel)

    - Fri Jul 20 2007 Rex Dieter       <rdieter[AT]fedoraproject.org> - 6:3.5.7-12

    - fix unpackaged files

    - Fri Jul 20 2007 Rex Dieter       <rdieter[AT]fedoraproject.org> - 6:3.5.7-9

    - %ifnarch s390 s390x: BR: lm_sensors

    - Thu Jul 19 2007 Rex Dieter       <rdieter[AT]fedoraproject.org> - 6:3.5.7-7

    - omit dirs owned by kde-filesystem

    - Mon Jul 2 2007 Than Ngo <than at redhat.com> -       6:3.5.7-6

    - fix bz#244906

    - Wed Jun 20 2007 Rex Dieter       <rdieter[AT]fedoraproject.org> - 6:3.5.7-5

    - Provides: kdebase3(-devel)

    - Wed Jun 20 2007 Rex Dieter       <rdieter[AT]fedoraproject.org> - 6:3.5.7-4

    - -devel: Requires: %name...

    - portability++

    - Fri Jun 15 2007 Rex Dieter       <rdieter[AT]fedoraproject.org> - 6:3.5.7-3

    - specfile portability

    - Mon Jun 11 2007 Rex Dieter       <rdieter[AT]fedoraproject.org> - 6:3.5.7-2

    - fix BR: kdelibs-devel

    - cleanup Req's wrt kde-settings

    - Mon Jun 11 2007 Than Ngo <than at redhat.com> -       6:3.5.7-1.fc7.1

    - remove kdebase-3.4.2-npapi-64bit-fixes.patch, it's       included in new upstream

  - Wed Jun 6 2007 Than Ngo <than at redhat.com> -     6:3.5.7-0.1

    - 3.5.7

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Users could log in as root without having to enter the password if auto login was enabled and if kdm was configured to require the root passwort to shutdown the system (CVE-2007-4569).

JavaScript code could modify the URL in the address bar to make the currently displayed website appear to come from a different site (CVE-2007-4224).

The remote host is affected by the vulnerability described in GLSA-200710-15 (KDM: Local privilege escalation)

    Kees Huijgen discovered an error when checking the credentials which     can lead to a login without specifying a password. This only occurs     when auto login is configured for at least one user and a password is     required to shut down the machine.
  Impact :

    A local attacker could gain root privileges and execute arbitrary     commands by logging in as root without specifying root's password.
  Workaround :

    There is no known workaround at this time.

Updated kdebase packages that resolve several security flaws are now available for Red Hat Enterprise Linux 4 and 5.

This update has been rated as having moderate security impact by the Red Hat Security Response Team.

The kdebase packages provide the core applications for KDE, the K Desktop Environment. These core packages include Konqueror, the web browser and file manager.

These updated packages address the following vulnerabilities :

Kees Huijgen found a flaw in the way KDM handled logins when autologin and 'shutdown with password' were enabled. A local user would have been able to login via KDM as any user without requiring a password.
(CVE-2007-4569)

Two Konqueror address spoofing flaws were discovered. A malicious website could spoof the Konqueror address bar, tricking a victim into believing the page was from a different site. (CVE-2007-3820, CVE-2007-4224)

Users of KDE should upgrade to these updated packages, which contain backported patches to correct these issues.

The remote Fedora Core host is missing one or more security updates :

kdebase-3.5.7-1.fc6 :

  - Tue Oct 2 2007 Than Ngo <than at redhat.com> -     6:3.5.7-1.fc6

    - CVE-2007-4224, CVE-2007-4225, CVE-2007-3820

    - rh#299741, CVE-2007-4569

    - Mon Jul 2 2007 Than Ngo <than at redhat.com> -       6:3.5.7-0.fc6.2

    - fix #244906

kdelibs-3.5.7-1.fc6 :

  - Tue Oct 2 2007 Than Ngo <than at redhat.com> -     6:3.5.7-1.fc6

    - CVE-2007-4224, CVE-2007-3820 konqueror address bar       spoofing

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora security advisory. Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

A vulnerability was discovered in KDM by Kees Huijgen where under certain circumstances and in particular configurations, KDM could be tricked into allowing users to login without a password.

Updated packages have been patched to prevent this issue.

New kdebase packages are available for Slackware 12.0 to fix security issues. A long URL padded with spaces could be used to display a false URL in Konqueror's addressbar, and KDM when used with no-password login could be tricked into logging a different user in without a password. This is not the way KDM is configured in Slackware by default, somewhat mitigating the impact of this issue.

The KDE development team reports :

KDM can be tricked into performing a password-less login even for accounts with a password set under certain circumstances, namely autologin to be configured and 'shutdown with password' enabled.

iKees Huijgen discovered that under certain circumstances KDM, an X session manager for KDE, could be tricked into allowing user logins without a password.

ID	Name	Product	Family	Severity
67573	Oracle Linux 4 / 5 : kdebase (ELSA-2007-0905)	Nessus	Oracle Linux Local Security Checks	medium
60262	Scientific Linux Security Update : kdebase on SL5.x, SL4.x i386/x86_64	Nessus	Scientific Linux Local Security Checks	medium
29429	SuSE 10 Security Update : KDE (ZYPP Patch Number 4433)	Nessus	SuSE Local Security Checks	medium
28122	Ubuntu 6.06 LTS / 6.10 / 7.04 : kdebase vulnerability (USN-517-1)	Nessus	Ubuntu Local Security Checks	medium
27769	Fedora 7 : kdebase-3.5.7-13.1.fc7 (2007-2361)	Nessus	Fedora Local Security Checks	medium
27217	openSUSE 10 Security Update : fileshareset (fileshareset-4454)	Nessus	SuSE Local Security Checks	medium
27050	GLSA-200710-15 : KDM: Local privilege escalation	Nessus	Gentoo Local Security Checks	medium
26973	CentOS 4 / 5 : kdebase (CESA-2007:0905)	Nessus	CentOS Local Security Checks	medium
26951	RHEL 4 / 5 : kdebase (RHSA-2007:0905)	Nessus	Red Hat Local Security Checks	medium
26935	Fedora Core 6 : kdebase-3.5.7-1.fc6 / kdelibs-3.5.7-1.fc6 (2007-716)	Nessus	Fedora Local Security Checks	medium
26900	Mandrake Linux Security Advisory : kdebase (MDKSA-2007:190)	Nessus	Mandriva Local Security Checks	medium
26113	Slackware 12.0 : kdebase, kdelibs (SSA:2007-264-01)	Nessus	Slackware Local Security Checks	medium
26091	FreeBSD : kdm -- passwordless login vulnerability (79b616d0-66d1-11dc-b25f-02e0185f8d72)	Nessus	FreeBSD Local Security Checks	medium
26079	Debian DSA-1376-1 : kdebase - programming error	Nessus	Debian Local Security Checks	medium

Detections

Analytics

CVE-2007-4569

critical

Tenable Plugins

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium

medium