{
  "id": "openEuler-SA-2022-2009",
  "url": "https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2022-2009",
  "title": "An update for dhcp is now available for openEuler-20.03-LTS-SP1,openEuler-20.03-LTS-SP3 and openEuler-22.03-LTS",
  "severity": "High",
  "description": "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.\r\n\r\nSecurity Fix(es):\r\n\r\nIn 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-2022-2928)\r\n\r\nIn 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-2022-2929)",
  "cves": [
    {
      "id": "CVE-2022-2929",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-2929",
      "severity": "High"
    }
  ]
}