high
7.5
CWE
20
Advisory Published
CVE Published
Updated

CVE-2011-0997: Input Validation

First published: Tue Mar 22 2011(Updated: )

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.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
ISC DHCP=3.0.4-b2
ISC DHCP=3.1.0-b1
ISC DHCP=3.1.0-a3
ISC DHCP=3.0.6-rc1
ISC DHCP=3.1.2-rc1
ISC DHCP=3.1.0-rc1
ISC DHCP=3.0.4-b1
ISC DHCP=3.1.0-a1
ISC DHCP=3.0.1-rc12
ISC DHCP=3.0
ISC DHCP=3.0.2-b1
ISC DHCP=3.0.3-b1
ISC DHCP=3.0.1-rc1
ISC DHCP=3.0.4-b3
ISC DHCP=3.0.2-rc1
ISC DHCP=3.0.1-rc7
ISC DHCP=3.1-esv
ISC DHCP=3.0.2-rc3
ISC DHCP=3.0.1-rc2
ISC DHCP=3.1.3-b1
ISC DHCP=3.0.1-rc14
ISC DHCP=3.0.1-rc6
ISC DHCP=3.0.2-rc2
ISC DHCP=3.0.1-rc13
ISC DHCP=3.0.1-rc9
ISC DHCP=3.0.3-b3
ISC DHCP=3.1.1-rc1
ISC DHCP=3.1.0-a2
ISC DHCP=3.0.1-rc8
ISC DHCP=3.0.3-b2
ISC DHCP=3.1.2-b1
ISC DHCP=3.1.3-rc1
ISC DHCP=3.0.1-rc10
ISC DHCP=3.0.5-rc1
ISC DHCP=3.0.1-rc11
ISC DHCP=3.1.1-rc2
ISC DHCP=3.0.4-rc1
ISC DHCP=3.1.0-b2
ISC DHCP=3.0.1-rc5
ISC DHCP=3.0.1
ISC DHCP=3.0.2
ISC DHCP=3.0.4
ISC DHCP=3.0.5
ISC DHCP=3.1.0
ISC DHCP=3.1.2
ISC DHCP=3.1.3
ISC DHCP=3.0.3
ISC DHCP=4.2.0-b2
ISC DHCP=4.2.0-a2
ISC DHCP=4.2.0-b1
ISC DHCP=4.2.1-rc1
ISC DHCP=4.2.0-a1
ISC DHCP=4.1-esv-rc1
ISC DHCP=4.2.1-b1
ISC DHCP=4.2.0-rc1
ISC DHCP=4.2.0-p1
ISC DHCP=4.1-esv
ISC DHCP=4.2.0
ISC DHCP=4.2.1
Debian Linux=5.0
Debian Linux=7.0
Debian Linux=6.0
Ubuntu=10.10
Ubuntu=6.06
Ubuntu=8.04
Ubuntu=10.04
Ubuntu=9.10

Remedy

https://bugzilla.redhat.com/show_bug.cgi?id=689832

Remedy

https://www.isc.org/software/dhcp/advisories/cve-2011-0997

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2011-0997?

    CVE-2011-0997 has a severity rating of high due to its potential to allow remote code execution.

  • How do I fix CVE-2011-0997?

    To fix CVE-2011-0997, upgrade to ISC DHCP version 4.2.1-P1 or later, or to versions 3.1-ESV-R1 and 4.1-ESV-R2.

  • Which versions of ISC DHCP are affected by CVE-2011-0997?

    CVE-2011-0997 affects ISC DHCP versions 3.0.x through 4.2.x before 4.2.1-P1, as well as 3.1-ESV before 3.1-ESV-R1.

  • What are the potential risks associated with CVE-2011-0997?

    The risk associated with CVE-2011-0997 includes the possibility of remote attackers executing arbitrary commands on the affected system.

  • Is there a workaround for CVE-2011-0997?

    While upgrading is the best option, disabling DHCP or filtering DHCP requests can serve as a temporary workaround for CVE-2011-0997.

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