Is CVE-2011-0997 being actively exploited?

CVE-2011-0997 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2011-0997?

CVE-2011-0997 has a CVSS 2.0 base score of 7.5 (HIGH).

CVE-2011-0997

HIGH · CVSS 7.5EPSS 84.6%EU EUVD

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.

Key facts

CVSS score: 7.5 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-20
EPSS score: 84.6% (100th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2011-1008)
Published: April 8, 2011
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-1008 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
canonical / ubuntu linux
debian / debian linux
debian / debian linux
debian / debian linux
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp
isc / dhcp

and 17 more…

References

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

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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