CVE-2011-4539
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
02 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
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 15.21% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 96.4% of scored records. A rank, not a probability.
- NVD base score
- The NVD has published no score for this record
- NVD CVSS vector
- No NVD score to derive
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-16.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2011-12-08 11:00Z14 YR AGO
- Last updated
- 2024-08-07 00:09Z2 YR AGO
- Reserved
- 2011-11-22
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.1
- Document digest
- 35f35f59646551a88b1faebe71a9227fdb62ed0ec41e5fda6fe4f8724d97b8a4
05 Affected products
06 References
- www.mandriva.comMDVSA-2011:182http://www.mandriva.com/security/advisories?name=MDVSA-2011:182
- secunia.com47153http://secunia.com/advisories/47153
- lists.fedoraproject.orgFEDORA-2011-16976http://lists.fedoraproject.org/pipermail/package-announce/2012-January/071549.html
- www.ubuntu.comUSN-1309-1http://www.ubuntu.com/usn/USN-1309-1
- lists.opensuse.orgopenSUSE-SU-2011:1318http://lists.opensuse.org/opensuse-updates/2011-12/msg00006.html
- exchange.xforce.ibmcloud.comisc-dhcp-dhcpd-regex-dos(71680)https://exchange.xforce.ibmcloud.com/vulnerabilities/71680
- secunia.com47178http://secunia.com/advisories/47178
- www.isc.orghttps://www.isc.org/software/dhcp/advisories/cve-2011-4539
- lists.fedoraproject.orgFEDORA-2011-16981http://lists.fedoraproject.org/pipermail/package-announce/2011-December/070980.html
- www.debian.orgDSA-2519http://www.debian.org/security/2012/dsa-2519
- www.securitytracker.com1026393http://www.securitytracker.com/id?1026393
- security.gentoo.orgGLSA-201301-06http://security.gentoo.org/glsa/glsa-201301-06.xml
- www.securityfocus.com50971http://www.securityfocus.com/bid/50971
07 Fixed in
Debian 12
- isc-dhcp Fixed in 4.2.2.dfsg.1-5
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- isc-dhcp Fixed in 4.2.2.dfsg.1-5
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.