CVE-2018-5732
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (5.24%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 5.24% probability · 92th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- isc/dhcp
- Source
- security-officer@isc.org
References
- https://kb.isc.org/docs/aa-01565Vendor Advisory
- https://kb.isc.org/docs/aa-01565Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.