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CVE-2011-2749

44
FAUCET Score

CVE-2011-2749 describes a denial-of-service vulnerability in ISC DHCP versions 3.x and 4.x, including specific ESV releases, affecting various Linux distributions. Remote attackers can exploit this flaw by sending a specially crafted BOOTP packet, causing the DHCP daemon to crash. This vulnerability carries a high CVSS score of 7.8, indicating a critical impact with low attack complexity and no authentication required, leading to complete availability loss. Despite its severity, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
3.0CPE matchmatch criteria
cpe:2.3:a:isc:dhcp:3.0:*:*:*:*:*:*:*
3.0.1CPE matchmatch criteria
cpe:2.3:a:isc:dhcp:3.0.1:-:*:*:*:*:*:*
3.0.1CPE matchmatch criteria
cpe:2.3:a:isc:dhcp:3.0.1:rc1:*:*:*:*:*:*
3.0.1CPE matchmatch criteria
cpe:2.3:a:isc:dhcp:3.0.1:rc10:*:*:*:*:*:*
3.0.1CPE matchmatch criteria
cpe:2.3:a:isc:dhcp:3.0.1:rc11:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

7.8HIGH

AV:N/AC:L/Au:N/C:N/I:N/A:C

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
38.77%
Probability of exploitation in next 30 days
EPSS Percentile
98.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.3877 is in the 97th percentile among its peer group of 51,485 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 4Fixed in: dhcp-7:3.0.1-68.el4
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: dhcp-12:3.0.5-29.el5_7.1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: dhcp-12:4.1.1-19.P1.el6_1.1
View patch

Vendor Advisories (1)

redhatCVE-2011-2749Moderate

dhcp: denial of service flaws

Aug 10, 2011

References

kb.juniper.net / InfoCenter/index
Third Party Advisory
lists.fedoraproject.org / pipermail/package-announce/2011-September/065176.html
Third Party Advisory
lists.opensuse.org / opensuse-updates/2011-09/msg00014.html
Mailing ListThird Party Advisory
bugzilla.redhat.com / attachment.cgi
Issue TrackingThird Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingPatchThird Party Advisory
secunia.com / advisories/45582
Third Party Advisory
secunia.com / advisories/45595
Third Party Advisory
secunia.com / advisories/45629
Third Party Advisory
secunia.com / advisories/45639
Third Party Advisory
secunia.com / advisories/45817
Third Party Advisory
secunia.com / advisories/45918
Third Party Advisory
secunia.com / advisories/46780
Third Party Advisory
security.gentoo.org / glsa/glsa-201301-06.xml
Third Party Advisory
securitytracker.com / id
Third Party AdvisoryVDB Entry
hermes.opensuse.org / messages/11695711
Third Party Advisory
debian.org / security/2011/dsa-2292
Third Party Advisory
isc.org / files/release-notes/DHCP%203.1-ESV-R3_0.html
Vendor Advisory
isc.org / files/release-notes/DHCP%204.1-ESV-R3.html
Vendor Advisory
isc.org / files/release-notes/DHCP%204.2.2_0.html
Vendor Advisory
isc.org / software/dhcp/advisories/cve-2011-2748
Vendor Advisory
mandriva.com / security/advisories
Third Party Advisory
redhat.com / support/errata/RHSA-2011-1160.html
Third Party Advisory
securityfocus.com / bid/49120
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-1190-1
Third Party Advisory