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CVE-2018-5732

A specially constructed response from a malicious server can cause a buffer overflow in dhclient

Published: Oct 9, 2019Updated: Nov 21, 2024 Sources: CVE List NVD BDUCWE-119
7.5HIGH
NVD MITRE
EPSS Score
5.0%
Top 8.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:NI:NA:H
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:NConfidentiality
None
I:NIntegrity
None
A:HAvailability
High
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Weaknesses

CWE-119

Affected Products

ISC
commercial·USaka internet systems consortium
ISC DHCP
Networking Infrastructure
dhcp
Networking Infrastructure
Canonical Ltd.
commercial·GBaka canonical
UbuntuOn-premOS
Operating Systems / linux-distro
ООО «РусБИТех-Астра»
commercial·RUaka rusbitech-astra
Astra Linux Special EditionOn-premOS
Operating Systems / linux-distro
Red Hat Inc.
commercial·USaka red hat
Red Hat Enterprise LinuxOn-premOS
Operating Systems / linux-distro
Fedora Project
oss-project·USaka fedora
FedoraOn-premOS
Operating Systems / linux-distro
Slackware Linux Inc.
oss-project·USaka slackware
SlackwareOn-prem
Operating Systems / linux-distro
and 3 more affected products View all →

Exploitability

Official Patch Available
Is your org exposed to CVE-2018-5732?We can run the check for you — a free external exposure review, no install. Check my exposure

Attack Graph

Products CVE Techniques Tactics

Click technique nodes for MITRE ATT&CK details · drag to pan · Ctrl/⌘ + scroll to zoom, or go fullscreen.

MITRE ATT&CK

2 techniques
Initial Access
Privilege Escalation
View detailed technique mapping

References

https://kb.isc.org/docs/aa-01565
kb.isc.org
https://kb.isc.org/article/AA-01565
kb.isc.org
http://www.slackware.com/security/viewer.php?l=slackware-security&y=2018&m=slackware-security.560131
slackware.com
and 5 more references View all →

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