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CVE-2011-0997

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...

7.5 HighFix available

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.

Exploit likelihood

84.6%Up 69.3 points since Feb 4, 2022
90%50%10%1%

What each source reports

NVD Score used 7.5

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.

Record
CVE-2011-0997
CVSS 2.0
7.5 HighAV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness
CWE-20
Updated
2026-11-02
CVE List No score

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.

Record
CVE-2011-0997
Updated
2026-11-02
EUVDEUVD-2011-1008 No score

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.

Record
EUVD-2011-1008
Updated
2026-11-03
GitHub AdvisoriesGHSA-hhcj-97jg-v79c No score

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...

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.

Record
GHSA-hhcj-97jg-v79c
Weakness
CWE-20
Updated
2026-11-02
OSV No score

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.

Record
CVE-2011-0997
Updated
2026-11-02
OSVDEBIAN-CVE-2011-0997 No score

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.

Record
DEBIAN-CVE-2011-0997
Updated
2026-11-02
OSVopenSUSE-SU-2024:10358-1 No score

dhcp-4.3.3.P1-3.1 on GA media

These are all security issues fixed in the dhcp-4.3.3.P1-3.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10358-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
isc-dhcp
Debian:12
 before 4.1.1-P1-16.1
4.1.1-P1-16.1
isc-dhcp
Debian:13
 before 4.1.1-P1-16.1
4.1.1-P1-16.1
isc-dhcp
Debian:6.0
 before 4.1.1-P1-15+squeeze2, plus listed versions
4.1.1-P1-154.1.1-P1-15+squeeze1
4.1.1-P1-15+squeeze2
dhcp3
Debian:5.0
 before 3.1.1-6+lenny5, plus listed versions
3.1.1-63.1.1-6+lenny23.1.1-6+lenny33.1.1-6+lenny4
3.1.1-6+lenny5
dhclient
Red Hat:enterprise_linux:4::as
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp
Red Hat:enterprise_linux:4::as
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp-debuginfo
Red Hat:enterprise_linux:4::as
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp-devel
Red Hat:enterprise_linux:4::as
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhclient
Red Hat:enterprise_linux:4::desktop
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp
Red Hat:enterprise_linux:4::desktop
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
Show 41 moreShow less
Affected packages
PackageAffectedFixed
dhcp-debuginfo
Red Hat:enterprise_linux:4::desktop
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp-devel
Red Hat:enterprise_linux:4::desktop
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhclient
Red Hat:enterprise_linux:4::es
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp
Red Hat:enterprise_linux:4::es
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp-debuginfo
Red Hat:enterprise_linux:4::es
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp-devel
Red Hat:enterprise_linux:4::es
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhclient
Red Hat:enterprise_linux:4::ws
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp
Red Hat:enterprise_linux:4::ws
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp-debuginfo
Red Hat:enterprise_linux:4::ws
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhcp-devel
Red Hat:enterprise_linux:4::ws
 before 7:3.0.1-67.el4
7:3.0.1-67.el4
dhclient
Red Hat:enterprise_linux:5::server
 before 12:3.0.5-23.el5_6.4
12:3.0.5-23.el5_6.4
dhcp
Red Hat:enterprise_linux:5::server
 before 12:3.0.5-23.el5_6.4
12:3.0.5-23.el5_6.4
dhcp-debuginfo
Red Hat:enterprise_linux:5::server
 before 12:3.0.5-23.el5_6.4
12:3.0.5-23.el5_6.4
dhcp-devel
Red Hat:enterprise_linux:5::server
 before 12:3.0.5-23.el5_6.4
12:3.0.5-23.el5_6.4
libdhcp4client
Red Hat:enterprise_linux:5::server
 before 12:3.0.5-23.el5_6.4
12:3.0.5-23.el5_6.4
libdhcp4client-devel
Red Hat:enterprise_linux:5::server
 before 12:3.0.5-23.el5_6.4
12:3.0.5-23.el5_6.4
dhcp
Red Hat:enterprise_linux:6::client
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp-debuginfo
Red Hat:enterprise_linux:6::client
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp-devel
Red Hat:enterprise_linux:6::client
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhclient
Red Hat:enterprise_linux:6::client
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp
Red Hat:enterprise_linux:6::computenode
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp-debuginfo
Red Hat:enterprise_linux:6::computenode
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp-devel
Red Hat:enterprise_linux:6::computenode
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhclient
Red Hat:enterprise_linux:6::computenode
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp
Red Hat:enterprise_linux:6::server
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp-debuginfo
Red Hat:enterprise_linux:6::server
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp-devel
Red Hat:enterprise_linux:6::server
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhclient
Red Hat:enterprise_linux:6::server
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp
Red Hat:enterprise_linux:6::workstation
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp-debuginfo
Red Hat:enterprise_linux:6::workstation
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhcp-devel
Red Hat:enterprise_linux:6::workstation
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhclient
Red Hat:enterprise_linux:6::workstation
 before 12:4.1.1-12.P1.el6_0.4
12:4.1.1-12.P1.el6_0.4
dhclient
Red Hat:rhel_els:3::as
 before 7:3.0.1-10.3_EL3
7:3.0.1-10.3_EL3
dhcp
Red Hat:rhel_els:3::as
 before 7:3.0.1-10.3_EL3
7:3.0.1-10.3_EL3
dhcp-debuginfo
Red Hat:rhel_els:3::as
 before 7:3.0.1-10.3_EL3
7:3.0.1-10.3_EL3
dhcp-devel
Red Hat:rhel_els:3::as
 before 7:3.0.1-10.3_EL3
7:3.0.1-10.3_EL3
dhclient
Red Hat:rhel_els:3::es
 before 7:3.0.1-10.3_EL3
7:3.0.1-10.3_EL3
dhcp
Red Hat:rhel_els:3::es
 before 7:3.0.1-10.3_EL3
7:3.0.1-10.3_EL3
dhcp-debuginfo
Red Hat:rhel_els:3::es
 before 7:3.0.1-10.3_EL3
7:3.0.1-10.3_EL3
dhcp-devel
Red Hat:rhel_els:3::es
 before 7:3.0.1-10.3_EL3
7:3.0.1-10.3_EL3
dhcp
openSUSE:Tumbleweed
From an advisory covering 16 CVEs
 before 4.3.3.P1-3.1
4.3.3.P1-3.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2011-0997 is a high vulnerability (CVSS 7.5) in Isc Dhcp, published April 8, 2011. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 84.6%, the 99th percentile. Fixed in isc-dhcp 4.1.1-P1-16.1.

References

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