CVE-2018-5732
Last modified
CVE-2018-5732 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. EPSS estimates a 4.96% chance of exploitation in the next 30 days.
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
Metrics
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions | Update |
|---|---|---|---|
| Isc | Dhcp | >= 4.1.0, <= 4.1.2 | — |
| Isc | Dhcp | >= 4.2.0, < 4.2.8 | — |
| Isc | Dhcp | >= 4.3.0, < 4.3.6 | — |
| Isc | Dhcp | 4.1-esv | — |
| Isc | Dhcp | 4.1.2 | P1 |
| Isc | Dhcp | 4.4.0 | — |
References
- https://kb.isc.org/docs/aa-01565Vendor Advisory
- https://kb.isc.org/docs/aa-01565Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Modified
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