CVE-2011-4539

Description

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.

Category

5.0
CVSS
Severity: Medium
CVSS 2.0 •
EPSS 34.28% Top 5%
Vendor Advisory mandriva.com Vendor Advisory fedoraproject.org Vendor Advisory ubuntu.com Vendor Advisory opensuse.org Vendor Advisory fedoraproject.org Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory isc.org
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://www.mandriva.com/security/advisories?name=MDVSA-2011:182 third party advisory vendor advisory
http://secunia.com/advisories/47153 third party advisory
http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html vendor advisory mailing list third party advisory
http://www.ubuntu.com/usn/USN-1309-1 third party advisory vendor advisory
http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html vendor advisory mailing list third party advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/71680 third party advisory vdb entry
http://secunia.com/advisories/47178 third party advisory
https://www.isc.org/software/dhcp/advisories/cve-2011-4539 vendor advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html vendor advisory mailing list third party advisory
http://www.debian.org/security/2012/dsa-2519 third party advisory vendor advisory
http://www.securitytracker.com/id?1026393 third party advisory vdb entry
http://security.gentoo.org/glsa/glsa-201301-06.xml third party advisory vendor advisory
http://www.securityfocus.com/bid/50971 third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2011-4539?
CVE-2011-4539 has been scored as a medium severity vulnerability.
How to fix CVE-2011-4539?
To fix CVE-2011-4539, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2011-4539 being actively exploited in the wild?
It is possible that CVE-2011-4539 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~34% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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