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Fencer Intel
high 7.8

CVE-2011-2749 in the critical feed json

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…

published 2011-08-15 15 y ago modified 2026-06-16 4 mo ago also EUVD-2011-2724

cvss
7.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
38.8%
EPSS 38.8% chance of exploitation in 30 days, percentile 98%
public exploits
0
none known

Summary

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.

Patch / fix

  • isc-dhcp Debian 13, Debian 12 4.2.2-1

debian advisories DEBIAN-CVE-2011-2749

  • dhcp RHEL 4 7:3.0.1-68.el4
  • dhcp RHEL 5 12:3.0.5-29.el5_7.1
  • dhcp RHEL 6 12:4.1.1-19.P1.el6_1.1
  • dhclient RHEL 4 7:3.0.1-68.el4
  • dhclient RHEL 5 12:3.0.5-29.el5_7.1
  • dhclient RHEL 6 12:4.1.1-19.P1.el6_1.1
  • libdhcp4client RHEL 5 12:3.0.5-29.el5_7.1

red hat advisories RHSA-2011:1160

  • dhcp openSUSE Tumbleweed 4.3.3.P1-3.1

opensuse advisories openSUSE-SU-2024:10358-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2011-2749 updated cvss 5.0

dhcp: denial of service flaws

  • Red Hat Enterprise Linux (v. 5 server) dhcp 3.0.5-29.el5_7.1, dhclient 3.0.5-29.el5_7.1, libdhcp4client 3.0.5-29.el5_7.1 Red Hat Enterprise Linux AS version 4 dhcp 3.0.1-68.el4, dhclient 3.0.1-68.el4 Red Hat Enterprise Linux Desktop (v. 5 client) dhcp 3.0.5-29.el5_7.1, dhclient 3.0.5-29.el5_7.1, libdhcp4client 3.0.5-29.el5_7.1 Red Hat Enterprise Linux Desktop version 4 dhcp 3.0.1-68.el4, dhclient 3.0.1-68.el4 Red Hat Enterprise Linux ES version 4 dhcp 3.0.1-68.el4, dhclient 3.0.1-68.el4 Red Hat Enterprise Linux Server (v. 6) dhcp 4.1.1-19.P1.el6_1.1, dhclient 4.1.1-19.P1.el6_1.1
    +3 more products
    Red Hat Enterprise Linux Server Optional (v. 6) dhcp 4.1.1-19.P1.el6_1.1, dhclient 4.1.1-19.P1.el6_1.1 Red Hat Enterprise Linux WS version 4 dhcp 3.0.1-68.el4, dhclient 3.0.1-68.el4 Red Hat RHEL Desktop Workstation (v. 5 client) dhcp 3.0.5-29.el5_7.1, dhclient 3.0.5-29.el5_7.1, libdhcp4client 3.0.5-29.el5_7.1
    fixed: vendor fix RHSA-2011:1160

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

38.77% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 7.8 AV:N/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.