{"cve":"CVE-2011-0997","nvd":{"published":"2011-04-08T15:17:27.387","modified":"2026-06-16T23:28:25.937","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-20"],"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"],"products":["canonical:ubuntu_linux","debian:debian_linux","isc:dhcp"],"source":"nvd","synced_at":"2026-10-19T19:58:50.521460154+00:00"},"epss":{"cve":"CVE-2011-0997","score":0.84569,"percentile":0.99703,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}