CVE-2018-5733
A malicious client can overflow a reference counter in ISC dhcpd
- State
- Published
- Severity
- 5.9 Medium
- Published
- Jan 16, 2019
- Updated
- Apr 25, 2025
- Reserved
- Jan 17, 2018
Description
A malicious client which is allowed to send very large amounts of traffic (billions of packets) to a DHCP server can eventually overflow a 32-bit reference counter, potentially causing dhcpd to crash. Affects ISC DHCP 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 | 5.9 Medium | CVSS:3.0/AV:N/AC:H/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 |
|
References
- https://kb.isc.org/docs/aa-01567
- RHSA-2018:0469vendor-advisory
- DSA-4133vendor-advisory
- USN-3586-2vendor-advisory
- RHSA-2018:0483vendor-advisory
- USN-3586-1vendor-advisory
- 103188vdb-entry
- 1040437vdb-entry
- [debian-lts-announce] 20180322 [SECURITY] [DLA 1313-1] isc-dhcp security updatemailing-list
- https://security.netapp.com/advisory/ntap-20250425-0010/
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.