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{"affected_release": [{"advisory": "RHSA-2011:1819", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "dhcp-12:4.1.1-25.P1.el6_2.1", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2011-12-14T00:00:00Z"}], "bugzilla": {"description": "dhcp: DoS due to processing certain regular expressions", "id": "761265", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=761265"}, "csaw": false, "cvss": {"cvss_base_score": "4.3", "cvss_scoring_vector": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "status": "verified"}, "details": ["dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet."], "name": "CVE-2011-4539", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:4", "fix_state": "Not affected", "package_name": "dhcp", "product_name": "Red Hat Enterprise Linux 4"}, {"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "dhcp", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2011-12-07T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2011-4539\nhttps://nvd.nist.gov/vuln/detail/CVE-2011-4539"], "statement": "This issue did not affect the versions of dhcp as shipped with Red Hat Enterprise Linux 4 and 5.", "threat_severity": "Moderate"}