CVE-2011-2749

The server in ISC DHCP 3.x and 4.x before 4.2.2, 3.1-ESV before 3.1-ESV-R3, and 4.1-ESV before 4.1-ESV-R3 allows remote attackers to cause a denial of service (daemon exit) via a crafted BOOTP packet.

Published: 2011-08-15 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-2749 is rated Moderate Risk (60.8/100): CVSS High severity, with high exploitation likelihood (EPSS 75.34%, 99th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-2749

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-08-12 83.08% 75.34% -7.75%
2 2025-04-15 83.85% 83.08% -0.77%
3 2025-03-30 — 83.85% —

Full EPSS history (12 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-2749

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2011-2749

OS Trackers for CVE-2011-2749

vendor priority summary link
debian not yet assigned CVE-2011-2749 not yet assigned priority: Debian including 1 source packages (isc-dhcp), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2011-2749
gentoo normal CVE-2011-2749: 1 GLSA(s) (201301-06), 1 atom(s) (net-misc/dhcp); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2011-2749
redhat medium — https://access.redhat.com/security/cve/CVE-2011-2749
suse high CVE-2011-2749 severity important: SUSE including 60 source package names (dhcp-3.1.3.ESV-0.13.1, dhcp-4.2.3.P2-0.7.2, …), 92 product×package rows across 34 product lines (SUSE Linux Enterprise Desktop 12, SUSE Linux Enterprise Desktop 12 SP1, … (34 product lines)): Fixed 92. https://www.suse.com/security/cve/CVE-2011-2749/
ubuntu medium CVE-2011-2749 medium priority: Ubuntu including 2 source packages (dhcp3, isc-dhcp), 10 status rows across 5 suites (hardy, lucid, maverick, natty, upstream): released 6, DNE 4. https://ubuntu.com/security/CVE-2011-2749

Affected software / configurations for CVE-2011-2749

Vendor Product Version Raw CPE
isc dhcp 3.0 cpe:2.3:a:isc:dhcp:3.0:*:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:-:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc1:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc10:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc11:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc12:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc13:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc14:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc2:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc5:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc6:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc7:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc8:*:*:*:*:*:*
isc dhcp 3.0.1 cpe:2.3:a:isc:dhcp:3.0.1:rc9:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:-:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:b1:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:rc1:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:rc2:*:*:*:*:*:*
isc dhcp 3.0.2 cpe:2.3:a:isc:dhcp:3.0.2:rc3:*:*:*:*:*:*
isc dhcp 3.0.3 cpe:2.3:a:isc:dhcp:3.0.3:b1:*:*:*:*:*:*
isc dhcp 3.0.3 cpe:2.3:a:isc:dhcp:3.0.3:b2:*:*:*:*:*:*
isc dhcp 3.0.3 cpe:2.3:a:isc:dhcp:3.0.3:b3:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:-:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:b1:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:b2:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:b3:*:*:*:*:*:*
isc dhcp 3.0.4 cpe:2.3:a:isc:dhcp:3.0.4:rc1:*:*:*:*:*:*
isc dhcp 3.0.5 cpe:2.3:a:isc:dhcp:3.0.5:-:*:*:*:*:*:*
isc dhcp 3.0.5 cpe:2.3:a:isc:dhcp:3.0.5:rc1:*:*:*:*:*:*
isc dhcp 3.0.6 cpe:2.3:a:isc:dhcp:3.0.6:rc1:*:*:*:*:*:*
isc dhcp 3.1 cpe:2.3:a:isc:dhcp:3.1:*:*:*:*:*:*:*
isc dhcp 3.1-esv cpe:2.3:a:isc:dhcp:3.1-esv:*:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:-:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:a1:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:a2:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:a3:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:b1:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:b2:*:*:*:*:*:*
isc dhcp 3.1.0 cpe:2.3:a:isc:dhcp:3.1.0:rc1:*:*:*:*:*:*
isc dhcp 3.1.1 cpe:2.3:a:isc:dhcp:3.1.1:-:*:*:*:*:*:*
isc dhcp 3.1.1 cpe:2.3:a:isc:dhcp:3.1.1:rc1:*:*:*:*:*:*
isc dhcp 3.1.1 cpe:2.3:a:isc:dhcp:3.1.1:rc2:*:*:*:*:*:*
isc dhcp 3.1.2 cpe:2.3:a:isc:dhcp:3.1.2:-:*:*:*:*:*:*
isc dhcp 3.1.2 cpe:2.3:a:isc:dhcp:3.1.2:b1:*:*:*:*:*:*
isc dhcp 3.1.2 cpe:2.3:a:isc:dhcp:3.1.2:rc1:*:*:*:*:*:*
isc dhcp 3.1.3 cpe:2.3:a:isc:dhcp:3.1.3:-:*:*:*:*:*:*
isc dhcp 3.1.3 cpe:2.3:a:isc:dhcp:3.1.3:b1:*:*:*:*:*:*
isc dhcp 3.1.3 cpe:2.3:a:isc:dhcp:3.1.3:rc1:*:*:*:*:*:*
isc dhcp 4.0 cpe:2.3:a:isc:dhcp:4.0:*:*:*:*:*:*:*
isc dhcp 4.0-esv cpe:2.3:a:isc:dhcp:4.0-esv:*:*:*:*:*:*:*
isc dhcp 4.0.0 cpe:2.3:a:isc:dhcp:4.0.0:*:*:*:*:*:*:*
isc dhcp 4.0.1 cpe:2.3:a:isc:dhcp:4.0.1:-:*:*:*:*:*:*
isc dhcp 4.0.1 cpe:2.3:a:isc:dhcp:4.0.1:b1:*:*:*:*:*:*
isc dhcp 4.0.1 cpe:2.3:a:isc:dhcp:4.0.1:rc1:*:*:*:*:*:*
isc dhcp 4.0.2 cpe:2.3:a:isc:dhcp:4.0.2:-:*:*:*:*:*:*
isc dhcp 4.0.2 cpe:2.3:a:isc:dhcp:4.0.2:b1:*:*:*:*:*:*
isc dhcp 4.0.2 cpe:2.3:a:isc:dhcp:4.0.2:b2:*:*:*:*:*:*
isc dhcp 4.0.2 cpe:2.3:a:isc:dhcp:4.0.2:b3:*:*:*:*:*:*
isc dhcp 4.0.2 cpe:2.3:a:isc:dhcp:4.0.2:rc1:*:*:*:*:*:*
isc dhcp 4.0.3 cpe:2.3:a:isc:dhcp:4.0.3:-:*:*:*:*:*:*
isc dhcp 4.0.3 cpe:2.3:a:isc:dhcp:4.0.3:b1:*:*:*:*:*:*
isc dhcp 4.0.3 cpe:2.3:a:isc:dhcp:4.0.3:rc1:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:r3_b1:*:*:*:*:*:*
isc dhcp 4.1-esv cpe:2.3:a:isc:dhcp:4.1-esv:rc1:*:*:*:*:*:*
isc dhcp 4.1.0 cpe:2.3:a:isc:dhcp:4.1.0:*:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:-:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:b1:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:b2:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:b3:*:*:*:*:*:*
isc dhcp 4.1.1 cpe:2.3:a:isc:dhcp:4.1.1:rc1:*:*:*:*:*:*
isc dhcp 4.1.2 cpe:2.3:a:isc:dhcp:4.1.2:*:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:-:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:a1:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:a2:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:b1:*:*:*:*:*:*
isc dhcp 4.2.0 cpe:2.3:a:isc:dhcp:4.2.0:b2:*:*:*:*:*:*

References for CVE-2011-2749

URL Tags
http://kb.juniper.net/InfoCenter/index?page=content&id=JSA10761 Third Party Advisory
http://lists.fedoraproject.org/pipermail/package-announce/2011-September/065176.html Third Party Advisory
http://lists.opensuse.org/opensuse-updates/2011-09/msg00014.html Mailing List Third Party Advisory
http://secunia.com/advisories/45582 Third Party Advisory
http://secunia.com/advisories/45595 Third Party Advisory
http://secunia.com/advisories/45629 Third Party Advisory
http://secunia.com/advisories/45639 Third Party Advisory
http://secunia.com/advisories/45817 Third Party Advisory
http://secunia.com/advisories/45918 Third Party Advisory
http://secunia.com/advisories/46780 Third Party Advisory
http://security.gentoo.org/glsa/glsa-201301-06.xml Third Party Advisory
http://securitytracker.com/id?1025918 Third Party Advisory VDB Entry
http://www.debian.org/security/2011/dsa-2292 Third Party Advisory
http://www.isc.org/files/release-notes/DHCP%203.1-ESV-R3_0.html Vendor Advisory
http://www.isc.org/files/release-notes/DHCP%204.1-ESV-R3.html Vendor Advisory
http://www.isc.org/files/release-notes/DHCP%204.2.2_0.html Vendor Advisory
http://www.isc.org/software/dhcp/advisories/cve-2011-2748 Vendor Advisory
http://www.mandriva.com/security/advisories?name=MDVSA-2011:128 Third Party Advisory
http://www.redhat.com/support/errata/RHSA-2011-1160.html Third Party Advisory
http://www.securityfocus.com/bid/49120 Third Party Advisory VDB Entry
http://www.ubuntu.com/usn/USN-1190-1 Third Party Advisory
https://bugzilla.redhat.com/attachment.cgi?id=517665&action=diff Issue Tracking Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=729382 Issue Tracking Patch Third Party Advisory
https://hermes.opensuse.org/messages/11695711 Third Party Advisory
cvelogic Threat Intelligence