CVE-2011-0997

Severity: high (CVSS 7.5 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 84.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-04-08 · updated 2026-06-16
Weakness: CWE-20

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.

Affected products

Canonical Ubuntu Linux: 6.06, 8.04, 9.10, 10.04, 10.10
Debian Linux: 5.0, 6.0, 7.0
ISC DHCP: 3.0, 3.0.1, 3.0.1-rc1, 3.0.1-rc10, 3.0.1-rc11, 3.0.1-rc12 (+53)

References

http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/057888.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-April/058279.html
http://marc.info/?l=bugtraq&m=133226187115472&w=2
http://secunia.com/advisories/44037
http://secunia.com/advisories/44048
http://secunia.com/advisories/44089
http://secunia.com/advisories/44090
http://secunia.com/advisories/44103
http://secunia.com/advisories/44127
http://secunia.com/advisories/44180
http://security.gentoo.org/glsa/glsa-201301-06.xml

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