Explore top 10 tips to secure your open-source projects now. Read More

×
Alerts This Week
Warning Icon 1 501
Alerts This Week
Warning Icon 1 501

Ubuntu 20.04: USN-2021-1234-01 Critical SSL Vulnerability Issue

red hat
Calendar Grey September 5, 2013
Dist Redhat Esm H88
Urgent GDM security patch released for Red Hat 5 resolving privilege escalation vulnerability. Update immediately for enhanced security.
Updated gdm and initscripts packages that fix one security issue are now available for Red Hat Enterprise Linux 5

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

This update is available via the Red Hat Network. Details on how to use the Red Hat Network to apply this update are available at https://access.redhat.com/site/articles/11258

Summary

The GNOME Display Manager (GDM) provides the graphical login screen, shown shortly after boot up, log out, and when user-switching.
A race condition was found in the way GDM handled the X server sockets directory located in the system temporary directory. An unprivileged user could use this flaw to perform a symbolic link attack, giving them write access to any file, allowing them to escalate their privileges to root. (CVE-2013-4169)
Note that this erratum includes an updated initscripts package. To fix CVE-2013-4169, the vulnerable code was removed from GDM and the initscripts package was modified to create the affected directory safely during the system boot process. Therefore, this update will appear on all systems, however systems without GDM installed are not affected by this flaw.
Red Hat would like to thank the researcher with the nickname vladz for reporting this issue.
All users should upgrade to these updated packages, which correct this issue. The system must be rebooted for this update to take effect.

Topics%20covered

Topics Covered

security advisory update red hat privilege escalation important race condition gdm

References

https://access.redhat.com/security/cve/CVE-2013-4169 https://access.redhat.com/security/updates/classification/#important

Package List

Red Hat Enterprise Linux Desktop (v. 5 client):
Source:
i386: gdm-2.16.0-59.el5_9.1.i386.rpm gdm-debuginfo-2.16.0-59.el5_9.1.i386.rpm gdm-docs-2.16.0-59.el5_9.1.i386.rpm initscripts-8.45.42-2.el5_9.1.i386.rpm initscripts-debuginfo-8.45.42-2.el5_9.1.i386.rpm
x86_64: gdm-2.16.0-59.el5_9.1.x86_64.rpm gdm-debuginfo-2.16.0-59.el5_9.1.x86_64.rpm gdm-docs-2.16.0-59.el5_9.1.x86_64.rpm initscripts-8.45.42-2.el5_9.1.x86_64.rpm initscripts-debuginfo-8.45.42-2.el5_9.1.x86_64.rpm
Red Hat Enterprise Linux (v. 5 server):
Source:
i386: gdm-2.16.0-59.el5_9.1.i386.rpm gdm-debuginfo-2.16.0-59.el5_9.1.i386.rpm gdm-docs-2.16.0-59.el5_9.1.i386.rpm initscripts-8.45.42-2.el5_9.1.i386.rpm initscripts-debuginfo-8.45.42-2.el5_9.1.i386.rpm
ia64: gdm-2.16.0-59.el5_9.1.ia64.rpm gdm-debuginfo-2.16.0-59.el5_9.1.ia64.rpm gdm-docs-2.16.0-59.el5_9.1.ia64.rpm initscripts-8.45.42-2.el5_9.1.ia64.rpm initscripts-debuginfo-8.45.42-2.el5_9.1.ia64.rpm
ppc: gdm-2.16.0-59.el5_9.1.ppc.rpm gdm-debuginfo-2.16.0-59.el5_9.1.ppc.rpm gdm-docs-2.16.0-59.el5_9.1.ppc.rpm initscripts-8.45.42-2.el5_9.1.ppc.rpm initscripts-debuginfo-8.45.42-2.el5_9.1.ppc.rpm
s390x: gdm-2.16.0-59.el5_9.1.s390x.rpm gdm-debuginfo-2.16.0-59.el5_9.1.s390x.rpm gdm-docs-2.16.0-59.el5_9.1.s390x.rpm initscripts-8.45.42-2.el5_9.1.s390x.rpm

Read the Full Advisory


Severity
important
Lowest
Low
Medium
High
Critical

Advisory ID: RHSA-2013:1213-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2013:1213.html
Issue date: 2013-09-05

Topic

Updated gdm and initscripts packages that fix one security issue are nowavailable for Red Hat Enterprise Linux 5.The Red Hat Security Response Team has rated this update as havingimportant security impact. A Common Vulnerability Scoring System (CVSS)base score, which gives a detailed severity rating, is available from theCVE link in the References section.

Topics%20covered

Topics Covered

security advisory update red hat privilege escalation important race condition gdm

Relevant Releases Architectures

Red Hat Enterprise Linux (v. 5 server) - i386, ia64, ppc, s390x, x86_64

Red Hat Enterprise Linux Desktop (v. 5 client) - i386, x86_64

Bugs Fixed

988498 - CVE-2013-4169 gdm: TOCTTOU race condition on /tmp/.X11-unix

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.