CVE-2018-5732

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

State: Published
Severity: 7.5 High
Published: Oct 9, 2019
Updated: Sep 16, 2024
Reserved: Jan 17, 2018

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

Scores

CVSS	Score	Vector	Source
3.0	7.5 High	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	isc

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
ISC DHCPISC	ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0Affected

References

https://kb.isc.org/docs/aa-01565

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