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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 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.

Security Impact Summary

CVE-2011-0997 is a security vulnerability that . Impacting 3 products from isc, from debian, from canonical organizations running these solutions should prioritize assessment and patching.

Historical Context

Documented in 2011, this vulnerability occurred amid the cloud computing expansion era, where traditional network perimeter security models were being reevaluated. Organizations were transitioning from isolated infrastructure to interconnected systems, creating new attack surfaces that vulnerabilities like this could exploit.

Published

2011-04-08T15:17:27.387

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 7.5 (HIGH)

CVSSv2 Vector

AV:N/AC:L/Au:N/C:P/I:P/A:P

Access Vector: NETWORK
Access Complexity: LOW
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: PARTIAL

Exploitability Score

10.0

Impact Score

6.4

Weaknesses

Type: Primary
CWE-20

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	isc	dhcp	3.0	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.1	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.2	Yes
Application	isc	dhcp	3.0.3	Yes
Application	isc	dhcp	3.0.3	Yes
Application	isc	dhcp	3.0.3	Yes
Application	isc	dhcp	3.0.3	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.4	Yes
Application	isc	dhcp	3.0.5	Yes
Application	isc	dhcp	3.0.5	Yes
Application	isc	dhcp	3.0.6	Yes
Application	isc	dhcp	3.1-esv	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.0	Yes
Application	isc	dhcp	3.1.1	Yes
Application	isc	dhcp	3.1.1	Yes
Application	isc	dhcp	3.1.2	Yes
Application	isc	dhcp	3.1.2	Yes
Application	isc	dhcp	3.1.2	Yes
Application	isc	dhcp	3.1.3	Yes
Application	isc	dhcp	3.1.3	Yes
Application	isc	dhcp	3.1.3	Yes
Application	isc	dhcp	4.1-esv	Yes
Application	isc	dhcp	4.1-esv	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.0	Yes
Application	isc	dhcp	4.2.1	Yes
Application	isc	dhcp	4.2.1	Yes
Application	isc	dhcp	4.2.1	Yes
Operating System	debian	debian_linux	5.0	Yes
Operating System	debian	debian_linux	6.0	Yes
Operating System	debian	debian_linux	7.0	Yes
Operating System	canonical	ubuntu_linux	6.06	Yes
Operating System	canonical	ubuntu_linux	8.04	Yes
Operating System	canonical	ubuntu_linux	9.10	Yes
Operating System	canonical	ubuntu_linux	10.04	Yes
Operating System	canonical	ubuntu_linux	10.10	Yes

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761 Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057888.html Mailing List, Third Party Advisory ([email protected])
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058279.html Mailing List, Third Party Advisory ([email protected])
http://marc.info/?l=bugtraq&m=133226187115472&w=2 Mailing List, Third Party Advisory ([email protected])
http://secunia.com/advisories/44037 Third Party Advisory ([email protected])
http://secunia.com/advisories/44048 Third Party Advisory ([email protected])
http://secunia.com/advisories/44089 Third Party Advisory ([email protected])
http://secunia.com/advisories/44090 Third Party Advisory ([email protected])
http://secunia.com/advisories/44103 Third Party Advisory ([email protected])
http://secunia.com/advisories/44127 Third Party Advisory ([email protected])
http://secunia.com/advisories/44180 Third Party Advisory ([email protected])
http://security.gentoo.org/glsa/glsa-201301-06.xml Third Party Advisory ([email protected])
http://securitytracker.com/id?1025300 Third Party Advisory, VDB Entry ([email protected])
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.593345 Third Party Advisory ([email protected])
http://www.debian.org/security/2011/dsa-2216 Third Party Advisory ([email protected])
http://www.debian.org/security/2011/dsa-2217 Third Party Advisory ([email protected])
http://www.kb.cert.org/vuls/id/107886 Third Party Advisory, US Government Resource ([email protected])
http://www.mandriva.com/security/advisories?name=MDVSA-2011:073 Third Party Advisory ([email protected])
http://www.osvdb.org/71493 Broken Link ([email protected])
http://www.redhat.com/support/errata/RHSA-2011-0428.html Third Party Advisory ([email protected])
http://www.redhat.com/support/errata/RHSA-2011-0840.html Third Party Advisory ([email protected])
http://www.securityfocus.com/bid/47176 Third Party Advisory, VDB Entry ([email protected])
http://www.ubuntu.com/usn/USN-1108-1 Third Party Advisory ([email protected])
http://www.vupen.com/english/advisories/2011/0879 Permissions Required ([email protected])
http://www.vupen.com/english/advisories/2011/0886 Permissions Required ([email protected])
http://www.vupen.com/english/advisories/2011/0909 Permissions Required ([email protected])
http://www.vupen.com/english/advisories/2011/0915 Permissions Required ([email protected])
http://www.vupen.com/english/advisories/2011/0926 Permissions Required ([email protected])
http://www.vupen.com/english/advisories/2011/0965 Permissions Required ([email protected])
http://www.vupen.com/english/advisories/2011/1000 Permissions Required ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=689832 Issue Tracking, Patch, Third Party Advisory ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/66580 Third Party Advisory, VDB Entry ([email protected])
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12812 Third Party Advisory ([email protected])
https://www.exploit-db.com/exploits/37623/ Third Party Advisory, VDB Entry ([email protected])
https://www.isc.org/software/dhcp/advisories/cve-2011-0997 Patch, Vendor Advisory ([email protected])
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057888.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058279.html Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://marc.info/?l=bugtraq&m=133226187115472&w=2 Mailing List, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/44037 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/44048 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/44089 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/44090 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/44103 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/44127 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://secunia.com/advisories/44180 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://security.gentoo.org/glsa/glsa-201301-06.xml Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://securitytracker.com/id?1025300 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.593345 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2011/dsa-2216 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.debian.org/security/2011/dsa-2217 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.kb.cert.org/vuls/id/107886 Third Party Advisory, US Government Resource (af854a3a-2127-422b-91ae-364da2661108)
http://www.mandriva.com/security/advisories?name=MDVSA-2011:073 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.osvdb.org/71493 Broken Link (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2011-0428.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.redhat.com/support/errata/RHSA-2011-0840.html Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/47176 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
http://www.ubuntu.com/usn/USN-1108-1 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2011/0879 Permissions Required (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2011/0886 Permissions Required (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2011/0909 Permissions Required (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2011/0915 Permissions Required (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2011/0926 Permissions Required (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2011/0965 Permissions Required (af854a3a-2127-422b-91ae-364da2661108)
http://www.vupen.com/english/advisories/2011/1000 Permissions Required (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=689832 Issue Tracking, Patch, Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/66580 Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12812 Third Party Advisory (af854a3a-2127-422b-91ae-364da2661108)
https://www.exploit-db.com/exploits/37623/ Third Party Advisory, VDB Entry (af854a3a-2127-422b-91ae-364da2661108)
https://www.isc.org/software/dhcp/advisories/cve-2011-0997 Patch, Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For isc's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.