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