CVE-2018-5733: A malicious client can overflow a reference counter in ISC dhcpd
First published: Wed Feb 28 2018(Updated: )
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
Credit: security-officer@isc.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/dhcp | <4.1 | 4.1 |
| redhat/dhcp | <4.3.6 | 4.3.6 |
| redhat/dhcp | <4.4.1 | 4.4.1 |
| debian/isc-dhcp | 4.4.1-2.3+deb11u2 4.4.1-2.3+deb11u1 4.4.3-P1-2 4.4.3-P1-5 | |
| ISC DHCP Server | >=4.2.0<=4.2.8 | |
| ISC DHCP Server | >=4.3.0<=4.3.6 | |
| ISC DHCP Server | =4.1-esv | |
| ISC DHCP Server | =4.1-esv-r1 | |
| ISC DHCP Server | =4.1-esv-r10 | |
| ISC DHCP Server | =4.1-esv-r10_b1 | |
| ISC DHCP Server | =4.1-esv-r10_rc1 | |
| ISC DHCP Server | =4.1-esv-r11 | |
| ISC DHCP Server | =4.1-esv-r11_b1 | |
| ISC DHCP Server | =4.1-esv-r11_rc1 | |
| ISC DHCP Server | =4.1-esv-r11_rc2 | |
| ISC DHCP Server | =4.1-esv-r12 | |
| ISC DHCP Server | =4.1-esv-r12_b1 | |
| ISC DHCP Server | =4.1-esv-r12_p1 | |
| ISC DHCP Server | =4.1-esv-r13 | |
| ISC DHCP Server | =4.1-esv-r13_b1 | |
| ISC DHCP Server | =4.1-esv-r14 | |
| ISC DHCP Server | =4.1-esv-r14_b1 | |
| ISC DHCP Server | =4.1-esv-r15 | |
| ISC DHCP Server | =4.1-esv-r2 | |
| ISC DHCP Server | =4.1-esv-r3 | |
| ISC DHCP Server | =4.1-esv-r3_b1 | |
| ISC DHCP Server | =4.1-esv-r4 | |
| ISC DHCP Server | =4.1-esv-r5 | |
| ISC DHCP Server | =4.1-esv-r5_b1 | |
| ISC DHCP Server | =4.1-esv-r5_rc1 | |
| ISC DHCP Server | =4.1-esv-r5_rc2 | |
| ISC DHCP Server | =4.1-esv-r6 | |
| ISC DHCP Server | =4.1-esv-r7 | |
| ISC DHCP Server | =4.1-esv-r8 | |
| ISC DHCP Server | =4.1-esv-r8_b1 | |
| ISC DHCP Server | =4.1-esv-r8_rc1 | |
| ISC DHCP Server | =4.1-esv-r9 | |
| ISC DHCP Server | =4.1-esv-r9_b1 | |
| ISC DHCP Server | =4.1-esv-r9_rc1 | |
| ISC DHCP Server | =4.1-esv-rc1 | |
| ISC DHCP Server | =4.1.0 | |
| ISC DHCP Server | =4.4.0 | |
| redhat enterprise Linux desktop | =6.0 | |
| redhat enterprise Linux desktop | =7.0 | |
| redhat enterprise Linux server | =6.0 | |
| redhat enterprise Linux server | =7.0 | |
| redhat enterprise Linux server aus | =7.4 | |
| redhat enterprise Linux server aus | =7.6 | |
| redhat enterprise Linux server eus | =7.4 | |
| redhat enterprise Linux server eus | =7.5 | |
| redhat enterprise Linux server eus | =7.6 | |
| redhat enterprise Linux workstation | =6.0 | |
| redhat enterprise Linux workstation | =7.0 | |
| Ubuntu Linux | =14.04 | |
| Ubuntu Linux | =16.04 | |
| Ubuntu Linux | =17.10 | |
| Debian | =7.0 | |
| Debian | =8.0 | |
| Debian | =9.0 |
Remedy
Upgrade to the patched release most closely related to your current version of DHCP. DHCP 4.1-ESV-R15-P1 DHCP 4.3.6-P1 DHCP 4.4.1
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Reference Links
- https://security-tracker.debian.org/tracker/CVE-2018-5733
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2018-5733
- https://kb.isc.org/article/AA-01567/75/CVE-2018-5733
- https://security-tracker.debian.org/tracker/CVE-2017-3144
- https://security-tracker.debian.org/tracker/CVE-2018-5732
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=891785
- http://www.securityfocus.com/bid/103188
- http://www.securitytracker.com/id/1040437
- https://access.redhat.com/errata/RHSA-2018:0469
- https://access.redhat.com/errata/RHSA-2018:0483
- https://kb.isc.org/docs/aa-01567
- https://lists.debian.org/debian-lts-announce/2018/03/msg00015.html
- https://usn.ubuntu.com/3586-1/
- https://usn.ubuntu.com/3586-2/
- https://www.debian.org/security/2018/dsa-4133
- https://launchpad.net/bugs/cve/CVE-2018-5733
- https://kb.isc.org/article/AA-01567
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=1550246
- https://source.isc.org/cgi-bin/gitweb.cgi?p=dhcp.git;a=commitdiff;h=197b26f25309f947b97a83b8fdfc414b767798f8
- https://bugs.isc.org/Public/Bug/Display.html?id=47140
- https://bugzilla.redhat.com/show_bug.cgi?id=1549961
- https://gitlab.isc.org/isc-projects/dhcp/-/commit/197b26f25309f947b97a83b8fdfc414b767798f8
- https://gitlab.isc.org/isc-projects/dhcp/-/commit/99a25aedea02d9c259cb8fabf4be700fb32571a3
- https://nvd.nist.gov/vuln/detail/CVE-2018-5733
- https://ubuntu.com/security/CVE-2018-5733
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