Executive Summary

Summary
Title GDM: Local Denial of Service
Informations
Name GLSA-200709-11 First vendor Publication 2007-09-18
Vendor Gentoo Last vendor Modification 2007-09-18
Severity (Vendor) Low Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:L/AC:M/Au:S/C:N/I:N/A:P)
Cvss Base Score 1.5 Attack Range Local
Cvss Impact Score 2.9 Attack Complexity Medium
Cvss Expoit Score 2.7 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores

Detail

Synopsis

GDM can be crashed by a local user, preventing it from managing future displays.

Background

GDM is the GNOME display manager.

Description

The result of a g_strsplit() call is incorrectly parsed in the files daemon/gdm.c, daemon/gdmconfig.c, gui/gdmconfig.c and gui/gdmflexiserver.c, allowing for a null pointer dereference.

Impact

A local user could send a crafted message to /tmp/.gdm_socket that would trigger the null pointer dereference and crash GDM, thus preventing it from managing future displays.

Workaround

Restrict the write permissions on /tmp/.gdm_socket to trusted users only after each GDM restart.

Resolution

All GDM users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose "gnome-base/gdm"

References

[ 1 ] CVE-2007-3381 : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2007-3381

Availability

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200709-11.xml

Original Source

Url : http://security.gentoo.org/glsa/glsa-200709-11.xml

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:10887
 
Oval ID: oval:org.mitre.oval:def:10887
Title: The GDM daemon in GNOME Display Manager (GDM) before 2.14.13, 2.16.x before 2.16.7, 2.18.x before 2.18.4, and 2.19.x before 2.19.5 does not properly handle NULL return values from the g_strsplit function, which allows local users to cause a denial of service (persistent daemon crash) via a crafted command to the daemon's socket, related to (1) gdm.c and (2) gdmconfig.c in daemon/, and (3) gdmconfig.c and (4) gdmflexiserver.c in gui/.
Description: The GDM daemon in GNOME Display Manager (GDM) before 2.14.13, 2.16.x before 2.16.7, 2.18.x before 2.18.4, and 2.19.x before 2.19.5 does not properly handle NULL return values from the g_strsplit function, which allows local users to cause a denial of service (persistent daemon crash) via a crafted command to the daemon's socket, related to (1) gdm.c and (2) gdmconfig.c in daemon/, and (3) gdmconfig.c and (4) gdmflexiserver.c in gui/.
Family: unix Class: vulnerability
Reference(s): CVE-2007-3381
Version: 5
Platform(s): Red Hat Enterprise Linux 5
CentOS Linux 5
Oracle Linux 5
Product(s):
Definition Synopsis:
Definition Id: oval:org.mitre.oval:def:22688
 
Oval ID: oval:org.mitre.oval:def:22688
Title: ELSA-2007:0777: gdm security and bug fix update (Moderate)
Description: The GDM daemon in GNOME Display Manager (GDM) before 2.14.13, 2.16.x before 2.16.7, 2.18.x before 2.18.4, and 2.19.x before 2.19.5 does not properly handle NULL return values from the g_strsplit function, which allows local users to cause a denial of service (persistent daemon crash) via a crafted command to the daemon's socket, related to (1) gdm.c and (2) gdmconfig.c in daemon/, and (3) gdmconfig.c and (4) gdmflexiserver.c in gui/.
Family: unix Class: patch
Reference(s): ELSA-2007:0777-01
CVE-2007-3381
Version: 6
Platform(s): Oracle Linux 5
Product(s): gdm
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Application 48

OpenVAS Exploits

Date Description
2009-04-09 Name : Mandriva Update for gdm MDKSA-2007:169 (gdm)
File : nvt/gb_mandriva_MDKSA_2007_169.nasl
2009-02-27 Name : Fedora Update for gdm FEDORA-2007-1362
File : nvt/gb_fedora_2007_1362_gdm_fc7.nasl
2009-02-27 Name : Fedora Update for gdm FEDORA-2007-653
File : nvt/gb_fedora_2007_653_gdm_fc6.nasl
2008-09-24 Name : Gentoo Security Advisory GLSA 200709-11 (gdm)
File : nvt/glsa_200709_11.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
39560 GNOME Display Manager (gdm) g_strsplit Function Local DoS

Nessus® Vulnerability Scanner

Date Description
2013-07-12 Name : The remote Oracle Linux host is missing a security update.
File : oraclelinux_ELSA-2007-0777.nasl - Type : ACT_GATHER_INFO
2012-08-01 Name : The remote Scientific Linux host is missing a security update.
File : sl_20070807_gdm_on_SL5_x.nasl - Type : ACT_GATHER_INFO
2007-11-06 Name : The remote Fedora host is missing a security update.
File : fedora_2007-1362.nasl - Type : ACT_GATHER_INFO
2007-09-24 Name : The remote Gentoo host is missing one or more security-related patches.
File : gentoo_GLSA-200709-11.nasl - Type : ACT_GATHER_INFO
2007-08-28 Name : The remote Mandrake Linux host is missing one or more security updates.
File : mandrake_MDKSA-2007-169.nasl - Type : ACT_GATHER_INFO
2007-08-13 Name : The remote CentOS host is missing a security update.
File : centos_RHSA-2007-0777.nasl - Type : ACT_GATHER_INFO
2007-08-13 Name : The remote Red Hat host is missing a security update.
File : redhat-RHSA-2007-0777.nasl - Type : ACT_GATHER_INFO

Alert History

If you want to see full details history, please login or register.
0
Date Informations
2014-02-17 11:35:07
  • Multiple Updates