A specially constructed response from a malicious server can cause a buffer overflow in dhclient (ISC ISC DHCP)
At a glance
- Source
- NVD
- EPSS
- EPSS 5.24 % · percentile 93 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- isc
- NVD status
- Modified
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
Weaknesses (CWE)
- CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.0 | HIGH 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | isc |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
| CVSS 3.0 | HIGH 7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · security-officer@isc.org (Secondary) |
| CVSS 2.0 | MEDIUM 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2018-17501
- GCVE · GCVE-0-2018-5732
Affected configurations (NVD CPE)
cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*≥ 4.1.0 ≤ 4.1.2cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*≥ 4.2.0 < 4.2.8cpe:2.3:a:isc:dhcp:*:*:*:*:*:*:*:*≥ 4.3.0 < 4.3.6cpe:2.3:a:isc:dhcp:4.1-esv:-:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r10:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r10b1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r10rc1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r11:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r11b1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r11rc1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r11rc2:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r12:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r12-p1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r12b1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r13:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r13b1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r14:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r14b1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r15:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r2:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r3:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r3b1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r4:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r5:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r5b1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r5rc1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r5rc2:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r6:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r7:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r8:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r8b1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r8rc1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r9:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r9b1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1-esv:r9rc1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.1.2:p1:*:*:*:*:*:*cpe:2.3:a:isc:dhcp:4.4.0:*:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| ISC · ISC DHCP | affected ISC DHCP 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |