Total
25 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2022-2928 | 3 Debian, Fedoraproject, Isc | 3 Debian Linux, Fedora, Dhcp | 2023-12-10 | N/A | 6.5 MEDIUM |
| In ISC DHCP 4.4.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1, when the function option_code_hash_lookup() is called from add_option(), it increases the option's refcount field. However, there is not a corresponding call to option_dereference() to decrement the refcount field. The function add_option() is only used in server responses to lease query packets. Each lease query response calls this function for several options, so eventually, the reference counters could overflow and cause the server to abort. | |||||
| CVE-2022-2929 | 3 Debian, Fedoraproject, Isc | 3 Debian Linux, Fedora, Dhcp | 2023-12-10 | N/A | 6.5 MEDIUM |
| In ISC DHCP 1.0 -> 4.4.3, ISC DHCP 4.1-ESV-R1 -> 4.1-ESV-R16-P1 a system with access to a DHCP server, sending DHCP packets crafted to include fqdn labels longer than 63 bytes, could eventually cause the server to run out of memory. | |||||
| CVE-2021-25217 | 5 Debian, Fedoraproject, Isc and 2 more | 26 Debian Linux, Fedora, Dhcp and 23 more | 2023-12-10 | 3.3 LOW | 7.4 HIGH |
| 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 releases from those series, but they have not been officially tested for the vulnerability), The outcome of encountering the defect while reading a lease that will trigger it varies, according to: the component being affected (i.e., dhclient or dhcpd) whether the package was built as a 32-bit or 64-bit binary whether the compiler flag -fstack-protection-strong was used when compiling In dhclient, ISC has not successfully reproduced the error on a 64-bit system. However, on a 32-bit system it is possible to cause dhclient to crash when reading an improper lease, which could cause network connectivity problems for an affected system due to the absence of a running DHCP client process. In dhcpd, when run in DHCPv4 or DHCPv6 mode: if the dhcpd server binary was built for a 32-bit architecture AND the -fstack-protection-strong flag was specified to the compiler, dhcpd may exit while parsing a lease file containing an objectionable lease, resulting in lack of service to clients. Additionally, the offending lease and the lease immediately following it in the lease database may be improperly deleted. if the dhcpd server binary was built for a 64-bit architecture OR if the -fstack-protection-strong compiler flag was NOT specified, the crash will not occur, but it is possible for the offending lease and the lease which immediately followed it to be improperly deleted. | |||||
| CVE-2018-5732 | 1 Isc | 1 Dhcp | 2023-12-10 | 5.0 MEDIUM | 7.5 HIGH |
| 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 | |||||
| CVE-2018-5733 | 4 Canonical, Debian, Isc and 1 more | 8 Ubuntu Linux, Debian Linux, Dhcp and 5 more | 2023-12-10 | 5.0 MEDIUM | 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. 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. | |||||
| CVE-2017-3144 | 4 Canonical, Debian, Isc and 1 more | 9 Ubuntu Linux, Debian Linux, Dhcp and 6 more | 2023-12-10 | 5.0 MEDIUM | 7.5 HIGH |
| A vulnerability stemming from failure to properly clean up closed OMAPI connections can lead to exhaustion of the pool of socket descriptors available to the DHCP server. Affects ISC DHCP 4.1.0 to 4.1-ESV-R15, 4.2.0 to 4.2.8, 4.3.0 to 4.3.6. Older versions may also be affected but are well beyond their end-of-life (EOL). Releases prior to 4.1.0 have not been tested. | |||||
| CVE-2016-2774 | 3 Canonical, Debian, Isc | 3 Ubuntu Linux, Debian Linux, Dhcp | 2023-12-10 | 7.1 HIGH | 5.9 MEDIUM |
| ISC DHCP 4.1.x before 4.1-ESV-R13 and 4.2.x and 4.3.x before 4.3.4 does not restrict the number of concurrent TCP sessions, which allows remote attackers to cause a denial of service (INSIST assertion failure or request-processing outage) by establishing many sessions. | |||||
| CVE-2015-8605 | 4 Canonical, Debian, Isc and 1 more | 4 Ubuntu Linux, Debian Linux, Dhcp and 1 more | 2023-12-10 | 5.7 MEDIUM | 6.5 MEDIUM |
| ISC DHCP 4.x before 4.1-ESV-R12-P1, 4.2.x, and 4.3.x before 4.3.3-P1 allows remote attackers to cause a denial of service (application crash) via an invalid length field in a UDP IPv4 packet. | |||||
| CVE-2012-3954 | 3 Canonical, Debian, Isc | 3 Ubuntu Linux, Debian Linux, Dhcp | 2023-12-10 | 3.3 LOW | N/A |
| Multiple memory leaks in ISC DHCP 4.1.x and 4.2.x before 4.2.4-P1 and 4.1-ESV before 4.1-ESV-R6 allow remote attackers to cause a denial of service (memory consumption) by sending many requests. | |||||
| CVE-2012-3571 | 3 Canonical, Debian, Isc | 3 Ubuntu Linux, Debian Linux, Dhcp | 2023-12-10 | 6.1 MEDIUM | N/A |
| ISC DHCP 4.1.2 through 4.2.4 and 4.1-ESV before 4.1-ESV-R6 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a malformed client identifier. | |||||
| CVE-2012-3955 | 3 Canonical, Debian, Isc | 3 Ubuntu Linux, Debian Linux, Dhcp | 2023-12-10 | 7.1 HIGH | N/A |
| ISC DHCP 4.1.x before 4.1-ESV-R7 and 4.2.x before 4.2.4-P2 allows remote attackers to cause a denial of service (daemon crash) in opportunistic circumstances by establishing an IPv6 lease in an environment where the lease expiration time is later reduced. | |||||
| CVE-2013-2494 | 1 Isc | 1 Dhcp | 2023-12-10 | 4.9 MEDIUM | N/A |
| libdns in ISC DHCP 4.2.x before 4.2.5-P1 allows remote name servers to cause a denial of service (memory consumption) via vectors involving a regular expression, as demonstrated by a memory-exhaustion attack against a machine running a dhcpd process, a related issue to CVE-2013-2266. | |||||
| CVE-2012-3570 | 1 Isc | 1 Dhcp | 2023-12-10 | 5.7 MEDIUM | N/A |
| Buffer overflow in ISC DHCP 4.2.x before 4.2.4-P1, when DHCPv6 mode is enabled, allows remote attackers to cause a denial of service (segmentation fault and daemon exit) via a crafted client identifier parameter. | |||||
| CVE-2011-4539 | 3 Canonical, Debian, Isc | 3 Ubuntu Linux, Debian Linux, Dhcp | 2023-12-10 | 5.0 MEDIUM | N/A |
| dhcpd in ISC DHCP 4.x before 4.2.3-P1 and 4.1-ESV before 4.1-ESV-R4 does not properly handle regular expressions in dhcpd.conf, which allows remote attackers to cause a denial of service (daemon crash) via a crafted request packet. | |||||
| CVE-2011-2748 | 3 Canonical, Debian, Isc | 3 Ubuntu Linux, Debian Linux, Dhcp | 2023-12-10 | 7.8 HIGH | N/A |
| The server in ISC DHCP 3.x and 4.x before 4.2.2, 3.1-ESV before 3.1-ESV-R3, and 4.1-ESV before 4.1-ESV-R3 allows remote attackers to cause a denial of service (daemon exit) via a crafted DHCP packet. | |||||
| CVE-2010-3611 | 1 Isc | 1 Dhcp | 2023-12-10 | 4.3 MEDIUM | N/A |
| ISC DHCP server 4.0 before 4.0.2, 4.1 before 4.1.2, and 4.2 before 4.2.0-P1 allows remote attackers to cause a denial of service (NULL pointer dereference and crash) via a DHCPv6 packet containing a Relay-Forward message without an address in the Relay-Forward link-address field. | |||||
| CVE-2011-0413 | 1 Isc | 1 Dhcp | 2023-12-10 | 7.8 HIGH | N/A |
| The DHCPv6 server in ISC DHCP 4.0.x and 4.1.x before 4.1.2-P1, 4.0-ESV and 4.1-ESV before 4.1-ESV-R1, and 4.2.x before 4.2.1b1 allows remote attackers to cause a denial of service (assertion failure and daemon crash) by sending a message over IPv6 for a declined and abandoned address. | |||||
| CVE-2011-0997 | 3 Canonical, Debian, Isc | 3 Ubuntu Linux, Debian Linux, Dhcp | 2023-12-10 | 7.5 HIGH | N/A |
| dhclient in ISC DHCP 3.0.x through 4.2.x before 4.2.1-P1, 3.1-ESV before 3.1-ESV-R1, and 4.1-ESV before 4.1-ESV-R2 allows remote attackers to execute arbitrary commands via shell metacharacters in a hostname obtained from a DHCP message, as demonstrated by a hostname that is provided to dhclient-script. | |||||
| CVE-2010-3616 | 1 Isc | 1 Dhcp | 2023-12-10 | 5.0 MEDIUM | N/A |
| ISC DHCP server 4.2 before 4.2.0-P2, when configured to use failover partnerships, allows remote attackers to cause a denial of service (communications-interrupted state and DHCP client service loss) by connecting to a port that is only intended for a failover peer, as demonstrated by a Nagios check_tcp process check to TCP port 520. | |||||
| CVE-2011-4868 | 1 Isc | 1 Dhcp | 2023-12-10 | 6.1 MEDIUM | N/A |
| The logging functionality in dhcpd in ISC DHCP before 4.2.3-P2, when using Dynamic DNS (DDNS) and issuing IPv6 addresses, does not properly handle the DHCPv6 lease structure, which allows remote attackers to cause a denial of service (NULL pointer dereference and daemon crash) via crafted packets related to a lease-status update. | |||||