Public Date:
2011-A-0108, 2016-A-0293
689832: CVE-2011-0997 dhclient: insufficient sanitization of certain DHCP response values

The MITRE CVE dictionary describes this issue as:

dhclient in ISC DHCP 3.0.x through 4.2.x before 4.2.1-P1, 3.1-ESV before 3.1-ESV-R1, and 4.1-ESV before 4.1-ESV-R2 allows remote attackers to execute arbitrary commands via shell metacharacters in a hostname obtained from a DHCP message, as demonstrated by a hostname that is provided to dhclient-script.

Find out more about CVE-2011-0997 from the MITRE CVE dictionary dictionary and NIST NVD.

CVSS v2 metrics

Base Score 7.9
Base Metrics AV:A/AC:M/Au:N/C:C/I:C/A:C
Access Vector Adjacent Network
Access Complexity Medium
Authentication None
Confidentiality Impact Complete
Integrity Impact Complete
Availability Impact Complete

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Red Hat Security Errata

Platform Errata Release Date
Red Hat Enterprise Linux 6 (dhcp) RHSA-2011:0428 2011-04-08
Red Hat Enterprise Linux 5 (dhcp) RHSA-2011:0428 2011-04-08
Red Hat Enterprise Linux 4 (dhcp) RHSA-2011:0428 2011-04-08
Red Hat Enterprise Linux Extended Lifecycle Support 3 (dhcp) RHSA-2011:0840 2011-05-31


Red Hat would like to thank Sebastian Krahmer of the SuSE Security Team for reporting this issue.
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