Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Isc | Dhcp | >= 4.2.0, <= 4.2.8 |
| Redhat | Enterprise Linux Desktop | 6.0 |
| Redhat | Enterprise Linux Server | 6.0 |
| Redhat | Enterprise Linux Server Aus | 7.4 |
| Redhat | Enterprise Linux Server Eus | 7.4 |
| Redhat | Enterprise Linux Workstation | 6.0 |
| Canonical | Ubuntu Linux | 14.04 |
| Debian | Debian Linux | 7.0 |
Related Weaknesses (CWE)
References
- http://www.securityfocus.com/bid/103188Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040437Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0469Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0483Third Party Advisory
- https://kb.isc.org/docs/aa-01567Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00015.htmlThird Party Advisory
- https://usn.ubuntu.com/3586-1/Third Party Advisory
- https://usn.ubuntu.com/3586-2/Third Party Advisory
- https://www.debian.org/security/2018/dsa-4133Third Party Advisory
- http://www.securityfocus.com/bid/103188Third Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1040437Third Party AdvisoryVDB Entry
- https://access.redhat.com/errata/RHSA-2018:0469Third Party Advisory
- https://access.redhat.com/errata/RHSA-2018:0483Third Party Advisory
- https://kb.isc.org/docs/aa-01567Vendor Advisory
- https://lists.debian.org/debian-lts-announce/2018/03/msg00015.htmlThird Party Advisory
FAQ
What is CVE-2018-5733?
CVE-2018-5733 is a vulnerability with a CVSS score of 7.5 (HIGH). 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....
How severe is CVE-2018-5733?
CVE-2018-5733 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2018-5733?
Check the references section above for vendor advisories and patch information. Affected products include: Isc Dhcp, Redhat Enterprise Linux Desktop, Redhat Enterprise Linux Server, Redhat Enterprise Linux Server Aus, Redhat Enterprise Linux Server Eus.