CVE-2011-4539
MEDIUM severity · CVSS 5 · Improper input validation
5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges required—
User interaction—
Confidentiality impactNone
Integrity impactNone
Availability impact—
Exploit probability (EPSS)15%
AV:N/AC:L/Au:N/C:N/I:N/A:P
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Additional information
- NVD record
- http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.htmlAdvisory
- http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.htmlAdvisory
- http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.htmlAdvisory
- http://secunia.com/advisories/47153Advisory
- http://secunia.com/advisories/47178Advisory
- http://security.gentoo.org/glsa/glsa-201301-06.xmlAdvisory
- http://www.debian.org/security/2012/dsa-2519Advisory
- http://www.mandriva.com/security/advisories?name=MDVSA-2011:182Advisory