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Product · ISC

ISC DHCP

6 known vulnerabilities.

ISC DHCP at a glance

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All Critical High Medium Low Exploited only Public exploit

6 results · Feed

  • Medium 6.5
    CVE-2022-2929

    DHCP memory leak

    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.

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine
  • Medium 6.5
    CVE-2022-2928

    An option refcount overflow exists in dhcpd

    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 decreme…

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine
  • High 7.4
    CVE-2021-25217

    A buffer overrun in lease file parsing code can be used to exploit a common vulnerability shared by dhcpd and dhclient

    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 …

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Azure Linux Alpine
  • High 7.5
    CVE-2018-5732

    A specially constructed response from a malicious server can cause a buffer overflow in dhclient

    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 …

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine
  • Medium 5.9
    CVE-2018-5733 EPSS 20%

    A malicious client can overflow a reference counter in ISC dhcpd

    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…

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu Alpine
  • Medium 5.3
    CVE-2017-3144 EPSS 73%

    Failure to properly clean up closed OMAPI connections can exhaust available sockets

    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 ma…

    ISC ISC DHCP isc-dhcp isc-dhcp Debian Ubuntu