CVE-2011-4539

Home/CVE/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 dhcp

CVE

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 dhcp

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.

MEDIUM · CVSS 5 EPSS 0.32265

Schedule remediation

EPSS ≥ 0.10 - elevated exploitation probability
EPSS percentile: top 3% of all CVEs by exploitation likelihood

Sigma rules3 YARA rules0

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Weakness Classification

CWE-20Improper Input Validation

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Affected Products & Versions

isc dhcpall versions
canonical ubuntu linuxall versions
debian linuxall versions

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Sigma Hunt Rules

Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.

producthighDHCP Server Error Failed Loading the CallOut DLL

producthighDHCP Server Loaded the CallOut DLL

producthighDHCP Callout DLL Installation

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Scoring & Timeline

MEDIUM · CVSS v2 (legacy) · cve@mitre.org

View on NVD

This CVE predates CVSS v3; the legacy v2 score is shown so triage still has a severity to work with.

v2 Vector

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

Published to NVD08 Dec 2011 · 11:55 AM

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Vendor Advisories

suse-csafopenSUSE-SU-2024:10358-1
rhsaRHSA-2011:1850Important
usnUSN-1309-1
rhsaRHSA-2011:1819Moderate

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References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.htmlMailing ListThird Party Advisory

http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.htmlMailing ListThird Party Advisory

http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.htmlMailing ListThird Party Advisory

http://secunia.com/advisories/47153Third Party Advisory

http://secunia.com/advisories/47178Third Party Advisory

http://security.gentoo.org/glsa/glsa-201301-06.xmlThird Party Advisory

Show all 13 references

http://www.debian.org/security/2012/dsa-2519Third Party Advisory

http://www.mandriva.com/security/advisories?name=MDVSA-2011:182Third Party Advisory

http://www.securityfocus.com/bid/50971Third Party AdvisoryVDB Entry

http://www.securitytracker.com/id?1026393Third Party AdvisoryVDB Entry

http://www.ubuntu.com/usn/USN-1309-1Third Party Advisory

https://exchange.xforce.ibmcloud.com/vulnerabilities/71680Third Party AdvisoryVDB Entry

https://www.isc.org/software/dhcp/advisories/cve-2011-4539Vendor Advisory

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