CVE-2018-5733
published 2019-01-16CVE-2018-5733: 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…
PriorityP350high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
20.24%
97.2th percentile
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.
Affected
24 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| canonical | ubuntu_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | debian_linux | — | — |
| debian | isc-dhcp | < isc-dhcp 4.3.5-3.1 (bookworm) | isc-dhcp 4.3.5-3.1 (bookworm) |
| isc | dhcp | — | — |
| isc | dhcp | — | — |
| isc | dhcp | — | — |
| isc | dhcp | 4.2.0 – 4.2.8 | — |
| isc | dhcp | 4.3.0 – 4.3.6 | — |
| isc | isc_dhcp | — | — |
| redhat | enterprise_linux_desktop | — | — |
| redhat | enterprise_linux_desktop | — | — |
| redhat | enterprise_linux_server | — | — |
| redhat | enterprise_linux_server | — | — |
| redhat | enterprise_linux_server_aus | — | — |
| redhat | enterprise_linux_server_aus | — | — |
| redhat | enterprise_linux_server_eus | — | — |
| redhat | enterprise_linux_server_eus | — | — |
| redhat | enterprise_linux_server_eus | — | — |
| redhat | enterprise_linux_workstation | — | — |
| redhat | enterprise_linux_workstation | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv3.05.9MEDIUMCVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:N/I:N/A:P
osv7.5HIGH
vendor_debian7.5HIGH
vendor_redhat7.5HIGH
vendor_ubuntu7.5HIGH
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GHSA
GHSA-6f7q-j62j-5545: 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 refe
ghsa_unreviewed·2022-05-13
CVE-2018-5733 [HIGH] CWE-190 GHSA-6f7q-j62j-5545: 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 refe
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.
OSV
CVE-2018-5733: 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 refe
osv·2019-01-16·CVSS 7.5
CVE-2018-5733 [HIGH] CVE-2018-5733: 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 refe
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.
OSV
isc-dhcp vulnerabilities
osv·2018-03-01·CVSS 5.9
CVE-2016-2774 [MEDIUM] isc-dhcp vulnerabilities
isc-dhcp vulnerabilities
Konstantin Orekhov discovered that the DHCP server incorrectly handled a
large number of concurrent TCP sessions. A remote attacker could possibly
use this issue to cause a denial of service. This issue only affected
Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2774)
It was discovered that the DHCP server incorrectly handled socket
descriptors. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2017-3144)
Felix Wilhelm discovered that the DHCP client incorrectly handled certain
malformed responses. A remote attacker could use this issue to cause the
DHCP client to crash, resulting in a denial of service, or possibly execute
arbitrary code. In the default installation, attackers would be isolated by
the dhclient AppArmor profil
Ubuntu
DHCP vulnerabilities
vendor_ubuntu·2018-05-28·CVSS 7.5
CVE-2018-5732 [HIGH] DHCP vulnerabilities
Title: DHCP vulnerabilities
Summary: Several security issues were fixed in DHCP.
USN-3586-1 fixed a vulnerability in DHCP. This update provides
the corresponding update for Ubuntu 12.04 ESM.
Original advisory details:
Felix Wilhelm discovered that the DHCP client incorrectly handled certain
malformed responses. A remote attacker could use this issue to cause the
DHCP client to crash, resulting in a denial of service, or possibly execute
arbitrary code. In the default installation, attackers would be isolated by
the dhclient AppArmor profile. (CVE-2018-5732)
Felix Wilhelm discovered that the DHCP server incorrectly handled reference
counting. A remote attacker could possibly use this issue to cause the DHCP
server to crash, resulting in a denial of service. (CVE-2018-5733)
Instruction
Ubuntu
DHCP vulnerabilities
vendor_ubuntu·2018-03-01·CVSS 5.9
CVE-2016-2774 [MEDIUM] DHCP vulnerabilities
Title: DHCP vulnerabilities
Summary: Several security issues were fixed in DHCP.
Konstantin Orekhov discovered that the DHCP server incorrectly handled a
large number of concurrent TCP sessions. A remote attacker could possibly
use this issue to cause a denial of service. This issue only affected
Ubuntu 14.04 LTS and Ubuntu 16.04 LTS. (CVE-2016-2774)
It was discovered that the DHCP server incorrectly handled socket
descriptors. A remote attacker could possibly use this issue to cause a
denial of service. (CVE-2017-3144)
Felix Wilhelm discovered that the DHCP client incorrectly handled certain
malformed responses. A remote attacker could use this issue to cause the
DHCP client to crash, resulting in a denial of service, or possibly execute
arbitrary code. In the default installation, at
Red Hat
dhcp: Reference count overflow in dhcpd allows denial of service
vendor_redhat·2018-02-28·CVSS 7.5
CVE-2018-5733 [HIGH] CWE-190 dhcp: Reference count overflow in dhcpd allows denial of service
dhcp: Reference count overflow in dhcpd allows denial of service
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.
A denial of service flaw was found in the way dhcpd handled reference counting when processing client requests. A malicious DHCP client could use this flaw to trigger a reference count overflow on the server side, potentially causing dhcpd to crash, by sending large amounts of traffic.
Package: dhcp (Red Hat Enterprise Linux 5) - Will not fix
Package: dhcp (Red Hat Enterprise Linux 8) - Not affected
Debian
CVE-2018-5733: isc-dhcp - A malicious client which is allowed to send very large amounts of traffic (billi...
vendor_debian·2018·CVSS 7.5
CVE-2018-5733 [HIGH] CVE-2018-5733: isc-dhcp - A malicious client which is allowed to send very large amounts of traffic (billi...
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.
Scope: local
bookworm: resolved (fixed in 4.3.5-3.1)
bullseye: resolved (fixed in 4.3.5-3.1)
sid: resolved (fixed in 4.3.5-3.1)
trixie: resolved (fixed in 4.3.5-3.1)
No detection rules found.
No public exploits indexed.
Bugzilla
CVE-2018-5732 CVE-2018-5733 dhcp: various flaws [fedora-all]
bugzilla·2018-02-28·CVSS 7.5
CVE-2018-5732 [HIGH] CVE-2018-5732 CVE-2018-5733 dhcp: various flaws [fedora-all]
CVE-2018-5732 CVE-2018-5733 dhcp: various flaws [fedora-all]
This is an automatically created tracking bug! It was created to ensure
that one or more security vulnerabilities are fixed in affected versions
of fedora-all.
For comments that are specific to the vulnerability please use bugs filed
against the "Security Response" product referenced in the "Blocks" field.
For more information see:
http://fedoraproject.org/wiki/Security/TrackingBugs
When submitting as an update, use the fedpkg template provided in the next
comment(s). This will include the bug IDs of this tracking bug as well as
the relevant top-level CVE bugs.
Please also mention the CVE IDs being fixed in the RPM changelog and the
fedpkg commit message.
NOTE: this issue affects multiple supported versions of Fedora. While
Bugzilla
CVE-2018-5733 dhcp: Reference count overflow in dhcpd allows denial of service
bugzilla·2018-02-28·CVSS 7.5
CVE-2018-5733 [HIGH] CVE-2018-5733 dhcp: Reference count overflow in dhcpd allows denial of service
CVE-2018-5733 dhcp: Reference count overflow in dhcpd allows denial of service
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.
Versions of DHCP affected: 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
Discussion:
Acknowledgments:
Name: ISC
Upstream: Felix Wilhelm (Google)
---
Public now via upstream advisory.
External References:
https://kb.isc.org/article/AA-01567
---
Created dhcp tracking bugs for this issue:
Affects: fedora-all [bug 1550246]
---
Upstream commit:
https://source.isc.org/cgi-bin/gitweb.cgi?p=dhcp.git;a=commitdiff;h=197b26f25309f947b97a83b8fdfc414b767798f8
Upstream bug (not public):
https://bug
http://www.securityfocus.com/bid/103188http://www.securitytracker.com/id/1040437https://access.redhat.com/errata/RHSA-2018:0469https://access.redhat.com/errata/RHSA-2018:0483https://kb.isc.org/docs/aa-01567https://lists.debian.org/debian-lts-announce/2018/03/msg00015.htmlhttps://usn.ubuntu.com/3586-1/https://usn.ubuntu.com/3586-2/https://www.debian.org/security/2018/dsa-4133http://www.securityfocus.com/bid/103188http://www.securitytracker.com/id/1040437https://access.redhat.com/errata/RHSA-2018:0469https://access.redhat.com/errata/RHSA-2018:0483https://kb.isc.org/docs/aa-01567https://lists.debian.org/debian-lts-announce/2018/03/msg00015.htmlhttps://security.netapp.com/advisory/ntap-20250425-0010/https://usn.ubuntu.com/3586-1/https://usn.ubuntu.com/3586-2/https://www.debian.org/security/2018/dsa-4133
2019-01-16
Published