CVE-2018-5733
HIGH severity · CVSS 7.5 · Integer overflow
7.5CVSS HIGH
Summary
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.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)20%
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products we track (1)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://kb.isc.org/docs/aa-01567Advisory
- http://www.securityfocus.com/bid/103188Advisory
- http://www.securitytracker.com/id/1040437Advisory
- https://access.redhat.com/errata/RHSA-2018:0469Advisory
- https://access.redhat.com/errata/RHSA-2018:0483Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00015.htmlAdvisory
- https://usn.ubuntu.com/3586-1/Advisory
- https://usn.ubuntu.com/3586-2/Advisory