CVE-2011-0997

Name: CVE-2011-0997
Creator: NVD / NIST
Published: 2011-04-08T15:17:27.387+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 84.17%

Last modified Jun 16, 2026

CVE-2011-0997 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 84.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

EPSS Probability

84.17%

99.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions	Update
Isc	Dhcp	3.0	—
Isc	Dhcp	3.0.1	—
Isc	Dhcp	3.0.2	—
Isc	Dhcp	3.0.3	—
Isc	Dhcp	3.0.4	—
Isc	Dhcp	3.0.5	—
Isc	Dhcp	3.0.6	Rc1
Isc	Dhcp	3.1-esv	—
Isc	Dhcp	3.1.0	—
Isc	Dhcp	3.1.1	Rc1
Isc	Dhcp	3.1.2	—
Isc	Dhcp	3.1.3	—
Isc	Dhcp	4.1-esv	—
Isc	Dhcp	4.2.0	—
Isc	Dhcp	4.2.1	—
Debian	Debian Linux	5.0	—
Debian	Debian Linux	6.0	—
Debian	Debian Linux	7.0	—
Canonical	Ubuntu Linux	6.06	—
Canonical	Ubuntu Linux	8.04	—
Canonical	Ubuntu Linux	9.10	—
Canonical	Ubuntu Linux	10.04	—
Canonical	Ubuntu Linux	10.10	—

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057888.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058279.htmlMailing List, Third Party Advisory
http://marc.info/?l=bugtraq&m=133226187115472&w=2Mailing List, Third Party Advisory
http://secunia.com/advisories/44037Third Party Advisory
http://secunia.com/advisories/44048Third Party Advisory
http://secunia.com/advisories/44089Third Party Advisory
http://secunia.com/advisories/44090Third Party Advisory
http://secunia.com/advisories/44103Third Party Advisory
http://secunia.com/advisories/44127Third Party Advisory
http://secunia.com/advisories/44180Third Party Advisory
http://security.gentoo.org/glsa/glsa-201301-06.xmlThird Party Advisory
http://securitytracker.com/id?1025300Third Party Advisory, VDB Entry
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.593345Third Party Advisory
http://www.debian.org/security/2011/dsa-2216Third Party Advisory
http://www.debian.org/security/2011/dsa-2217Third Party Advisory
http://www.kb.cert.org/vuls/id/107886Third Party Advisory, US Government Resource
http://www.mandriva.com/security/advisories?name=MDVSA-2011:073Third Party Advisory
http://www.osvdb.org/71493Broken Link
http://www.redhat.com/support/errata/RHSA-2011-0428.htmlThird Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-0840.htmlThird Party Advisory
http://www.securityfocus.com/bid/47176Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-1108-1Third Party Advisory
http://www.vupen.com/english/advisories/2011/0879Permissions Required
http://www.vupen.com/english/advisories/2011/0886Permissions Required
http://www.vupen.com/english/advisories/2011/0909Permissions Required
http://www.vupen.com/english/advisories/2011/0915Permissions Required
http://www.vupen.com/english/advisories/2011/0926Permissions Required
http://www.vupen.com/english/advisories/2011/0965Permissions Required
http://www.vupen.com/english/advisories/2011/1000Permissions Required
https://bugzilla.redhat.com/show_bug.cgi?id=689832Issue Tracking, Patch, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/66580Third Party Advisory, VDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12812Third Party Advisory
https://www.exploit-db.com/exploits/37623/Third Party Advisory, VDB Entry
https://www.isc.org/software/dhcp/advisories/cve-2011-0997Patch, Vendor Advisory
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057888.htmlMailing List, Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058279.htmlMailing List, Third Party Advisory
http://marc.info/?l=bugtraq&m=133226187115472&w=2Mailing List, Third Party Advisory
http://secunia.com/advisories/44037Third Party Advisory
http://secunia.com/advisories/44048Third Party Advisory
http://secunia.com/advisories/44089Third Party Advisory
http://secunia.com/advisories/44090Third Party Advisory
http://secunia.com/advisories/44103Third Party Advisory
http://secunia.com/advisories/44127Third Party Advisory
http://secunia.com/advisories/44180Third Party Advisory
http://security.gentoo.org/glsa/glsa-201301-06.xmlThird Party Advisory
http://securitytracker.com/id?1025300Third Party Advisory, VDB Entry
http://slackware.com/security/viewer.php?l=slackware-security&y=2011&m=slackware-security.593345Third Party Advisory
http://www.debian.org/security/2011/dsa-2216Third Party Advisory
http://www.debian.org/security/2011/dsa-2217Third Party Advisory
http://www.kb.cert.org/vuls/id/107886Third Party Advisory, US Government Resource
http://www.mandriva.com/security/advisories?name=MDVSA-2011:073Third Party Advisory
http://www.osvdb.org/71493Broken Link
http://www.redhat.com/support/errata/RHSA-2011-0428.htmlThird Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-0840.htmlThird Party Advisory
http://www.securityfocus.com/bid/47176Third Party Advisory, VDB Entry
http://www.ubuntu.com/usn/USN-1108-1Third Party Advisory
http://www.vupen.com/english/advisories/2011/0879Permissions Required
http://www.vupen.com/english/advisories/2011/0886Permissions Required
http://www.vupen.com/english/advisories/2011/0909Permissions Required
http://www.vupen.com/english/advisories/2011/0915Permissions Required
http://www.vupen.com/english/advisories/2011/0926Permissions Required
http://www.vupen.com/english/advisories/2011/0965Permissions Required
http://www.vupen.com/english/advisories/2011/1000Permissions Required
https://bugzilla.redhat.com/show_bug.cgi?id=689832Issue Tracking, Patch, Third Party Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/66580Third Party Advisory, VDB Entry
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A12812Third Party Advisory
https://www.exploit-db.com/exploits/37623/Third Party Advisory, VDB Entry
https://www.isc.org/software/dhcp/advisories/cve-2011-0997Patch, Vendor Advisory

Timeline

Published: Apr 8, 2011
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2011-0997?

How severe is CVE-2011-0997?

Severity scoring for CVE-2011-0997 is pending analysis. The EPSS model estimates a 84.17% probability of exploitation in the next 30 days.

How do I fix CVE-2011-0997?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2011-0997?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST