CVE-2018-5732

high-risk
Published 2019-10-09

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

Do I need to act?

~
3.6% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (20)

Affected Vendors

Isc

References (2)

Vendor Advisory https://kb.isc.org/docs/aa-01565
Vendor Advisory https://kb.isc.org/docs/aa-01565
56
/ 100
high-risk
Severity 26/34 · High
Exploitability 7/34 · Low
Exposure 23/34 · High