CVE-2021-34737

A vulnerability in the DHCP version 4 DHCPv4 server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service DoS condition. This vulnerability exists because certain DHCPv4 messages are improperly...

Cisco IOS XR Software DHCP Denial of Service Vulnerability

Cisco IOS XR Software is a set of operating systems developed by Cisco for its network devices.Cisco IOS XR Software DHCP denial of service vulnerability can be exploited to trigger a crash of the dhcpd process, resulting in a denial of service...

CVE-2021-34737

A vulnerability in the DHCP version 4 DHCPv4 server feature of Cisco IOS XR Software could allow an unauthenticated, remote attacker to trigger a crash of the dhcpd process, resulting in a denial of service DoS condition. This vulnerability exists because certain DHCPv4 messages are improperly...

EulerOS 2.0 SP5 : dhcp (EulerOS-SA-2021-2326)

According to the version of the dhcp packages installed, the EulerOS installation on the remote host is affected by the following vulnerability : - In ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16, ISC DHCP 4.4.0 - 4.4.2 Other branches of ISC DHCP i.e., releases in the 4.0.x series or lower and releases in t...

EulerOS 2.0 SP8 : dhcp (EulerOS-SA-2021-2291)

According to the version of the dhcp packages installed, the EulerOS installation on the remote host is affected by the following vulnerability : - In ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16, ISC DHCP 4.4.0 - 4.4.2 Other branches of ISC DHCP i.e., releases in the 4.0.x series or lower and releases in t...

openSUSE: Security Advisory for dhcp (openSUSE-SU-2021:1841-1)

The remote host is missing an update for the Copyright C 2021 Greenbone Networks GmbH Some text descriptions might be excerpted from a referenced sources, and are Copyright C by the respective right holders. SPDX-License-Identifier: GPL-2.0-or-later This program is free software; you can...

OESA-2021-1226 dhcp security update

The Dynamic Host Configuration Protocol DHCP is a network management protocol used on UDP/IP networks whereby a DHCP server dynamically assigns an IP address and other network configuration parameters to each device on a network so they can communicate with other IP networks. Security Fixes: In I...

RHEL 7 : dhcp (RHSA-2021:2414)

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2021:2414 advisory. The Dynamic Host Configuration Protocol DHCP is a protocol that allows individual devices on an IP network to get their own network configuration...

dhcp: stack-based buffer overflow when parsing statements with colon-separated hex digits in config or lease files in dhcpd and dhclient

A flaw was found in the Dynamic Host Configuration Protocol DHCP. There is a discrepancy between the code that handles encapsulated option information in leases transmitted "on the wire" and the code which reads and parses lease information after it has been written to disk storage. This flaw...

Oracle Linux 7 : dhcp (ELSA-2021-2357)

The remote Oracle Linux 7 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2021-2357 advisory. - Fix for CVE-2021-25217 Tenable has extracted the preceding description block directly from the Oracle Linux security advisory. Note that Nessus has not tested...

OPENSUSE-SU-2021:0834-1 Security update for dhcp

This update for dhcp fixes the following issues: - CVE-2021-25217: A buffer overrun in lease file parsing code can be used to exploit a common vulnerability shared by dhcpd and dhclient bsc1186382 This update was imported from the SUSE:SLE-15:Update update project...

Ubuntu 18.04 LTS / 20.04 LTS : DHCP vulnerability (USN-4969-1)

The remote Ubuntu 18.04 LTS / 20.04 LTS host has packages installed that are affected by a vulnerability as referenced in the USN-4969-1 advisory. Jon Franklin and Pawel Wieczorkiewicz discovered that DHCP incorrectly handled lease file parsing. A remote attacker could possibly use this issue to...

ALPINE-CVE-2021-25217

In ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16, ISC DHCP 4.4.0 - 4.4.2 Other branches of ISC DHCP i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series are beyond their End-of-Life EOL and no longer supported by ISC. From inspection it is clear that the defect is also present in...

CVE-2021-25217

In ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16, ISC DHCP 4.4.0 - 4.4.2 Other branches of ISC DHCP i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series are beyond their End-of-Life EOL and no longer supported by ISC. From inspection it is clear that the defect is also present in...

CVE-2021-25217

In ISC DHCP 4.1-ESV-R1 - 4.1-ESV-R16, ISC DHCP 4.4.0 - 4.4.2 Other branches of ISC DHCP i.e., releases in the 4.0.x series or lower and releases in the 4.3.x series are beyond their End-of-Life EOL and no longer supported by ISC. From inspection it is clear that the defect is also present in...

CVE-2021-25217

CVE-2021-25217 affects ISC DHCP (DHCP client/server) across multiple branches (notably 4.1-ESV-R16, 4.4.0–4.4.2; other 4.0/4.3 may be affected but untested). The vulnerability is a stack-based buffer overrun in parsing statements with colon-separated hex digits in config or lease files, potential...

dhcpd: use-after-free error leads crash in IPv6 mode when using mismatched BIND libraries

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Denial Of Service (DoS)

The Dynamic Host Configuration Protocol DHCP is vulnerable to denial of service DoS. Due to the way dhcpd daemon handled DHCP request packets when regular expression matching was used in "/etc/dhcp/dhcpd.conf", a remote attacker could use this flaw to crash dhcpd...

Denial Of Service (DoS)

dhcp is vulnerable to denial of service DoS. The vulnerability exists in the way the dhcpd daemon handled certain incomplete request packets. A remote attacker could use these flaws to crash dhcpd via a specially-crafted request...

DEBIAN-CVE-2019-6470

There had existed in one of the ISC BIND libraries a bug in a function that was used by dhcpd when operating in DHCPv6 mode. There was also a bug in dhcpd relating to the use of this function per its documentation, but the bug in the library function prevented this from causing any harm. All...