{"id":"CVE-2011-0997","aliases":["DEBIAN-CVE-2011-0997","DSA-2216-1","DSA-2217-1","EUVD-2011-1008","GHSA-hhcj-97jg-v79c","RHSA-2011:0428","RHSA-2011:0840","openSUSE-SU-2024:10358-1"],"status":"published","title":"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...","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.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.84569,"percentile":0.99704,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2011-04-08T15:00:00Z","modified":"2026-10-23T17:47:29Z","fixes":[{"ecosystem":"Debian:12","package":"isc-dhcp","fixed_in":["4.1.1-P1-16.1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"isc-dhcp","fixed_in":["4.1.1-P1-16.1"],"sources":["osv"]},{"ecosystem":"Debian:6.0","package":"isc-dhcp","fixed_in":["4.1.1-P1-15+squeeze2"],"sources":["osv"]},{"ecosystem":"Debian:5.0","package":"dhcp3","fixed_in":["3.1.1-6+lenny5"],"sources":["osv"]},{"ecosystem":"Red Hat:enterprise_linux:4::as","package":"dhclient","fixed_in":["7:3.0.1-67.el4"],"sources":["osv"]},{"ecosystem":"Red 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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.","status":"published","published":"2011-04-08T15:00:00Z","modified":"2024-08-06T22:14:27.265Z","updated_at":"2026-11-02T14:35:39.447402Z"}],"euvd":[{"id":"EUVD-2011-1008","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.","status":"published","published":"2011-04-08T15:00:00Z","modified":"2024-08-06T22:14:27Z","updated_at":"2026-11-03T01:55:58.301107Z"}],"ghsa":[{"id":"GHSA-hhcj-97jg-v79c","title":"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...","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.","status":"published","published":"2022-05-13T01:27:29Z","modified":"2025-04-11T03:46:49Z","cwes":["CWE-20"],"updated_at":"2026-11-02T15:01:08.227504Z"}],"nvd":[{"id":"CVE-2011-0997","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.","status":"published","published":"2011-04-08T15:17:27.387Z","modified":"2026-06-16T23:28:25.937Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:02:07.221228Z"}],"osv":[{"id":"CVE-2011-0997","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.","status":"published","published":"2011-04-08T15:17:27Z","modified":"2026-04-10T03:41:39.144937Z","updated_at":"2026-11-02T15:43:57.991581Z"},{"id":"DEBIAN-CVE-2011-0997","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 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Tumbleweed.","status":"published","published":"2024-06-15T00:00:00Z","modified":"2025-05-07T18:08:31.811732Z","updated_at":"2026-11-02T16:58:34.487567Z"},{"id":"RHSA-2011:0428","title":"Red Hat Security Advisory: dhcp security update","status":"published","published":"2024-09-15T19:04:42Z","modified":"2026-06-26T12:21:33.602448378Z","updated_at":"2026-11-02T15:53:01.003286Z"},{"id":"RHSA-2011:0840","title":"Red Hat Security Advisory: dhcp security update","status":"published","published":"2024-09-15T19:04:47Z","modified":"2026-01-14T10:59:33.713303Z","updated_at":"2026-11-02T15:53:01.003286Z"}]}}