Arbitrary Command Execution via Shell Metacharacters in dhclient

CVE-2011-0997 · HIGH Severity

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

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.

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