CVE-2018-5732
published 2019-10-09CVE-2018-5732: Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer…
PriorityP344high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
4.96%
91.1th percentile
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
Affected
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| 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 | 4.1.0 – 4.1.2 | — |
| isc | dhcp | >= 4.2.0 < 4.2.8 | 4.2.8 |
| isc | dhcp | >= 4.3.0 < 4.3.6 | 4.3.6 |
| isc | isc_dhcp | — | — |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv3.07.5HIGHCVSS:3.0/AV:N/AC:L/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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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: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server
vendor_redhat·2018-02-28·CVSS 7.5
CVE-2018-5732 [HIGH] CWE-119 dhcp: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server
dhcp: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
An out-of-bound memory access flaw was found in the way dhclient processed a DHCP response packet. A malicious DHCP server could potentially use this flaw to crash dhclient processes running on DHCP client machines via a crafted DHCP response packet.
Package: dhcp (Red Hat Enterprise Linux 5) - Will not fix
Package: dhcp (Red Hat Enter
Debian
CVE-2018-5732: isc-dhcp - Failure to properly bounds-check a buffer used for processing DHCP options allow...
vendor_debian·2018·CVSS 7.5
CVE-2018-5732 [HIGH] CVE-2018-5732: isc-dhcp - Failure to properly bounds-check a buffer used for processing DHCP options allow...
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 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)
GHSA
GHSA-j4cm-vph7-f7qg: Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause
ghsa_unreviewed·2022-05-24
CVE-2018-5732 [MEDIUM] GHSA-j4cm-vph7-f7qg: Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 4.1.0 -> 4.1-ESV-R15, 4.2.0 -> 4.2.8, 4.3.0 -> 4.3.6, 4.4.0
OSV
CVE-2018-5732: Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause
osv·2019-10-09·CVSS 7.5
CVE-2018-5732 [HIGH] CVE-2018-5732: Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause
Failure to properly bounds-check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section. Affects ISC DHCP versions 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
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-2018-5732 dhcp: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server
bugzilla·2018-02-28·CVSS 7.5
CVE-2018-5732 [HIGH] CVE-2018-5732 dhcp: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server
CVE-2018-5732 dhcp: Buffer overflow in dhclient possibly allowing code execution triggered by malicious server
Failure to properly bounds check a buffer used for processing DHCP options allows a malicious server (or an entity masquerading as a server) to cause a buffer overflow (and resulting crash) in dhclient by sending a response containing a specially constructed options section.
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-01565
---
Created dhcp tracking bugs for this issue:
Affects: fedora-all [bug 1550246]
---
Upstream commit:
https://source.isc.org/cgi-bin/gitweb.cgi?
2019-10-09
Published