Vulnerability Monitor

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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 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.

Published

2021-05-26T22:15:07.947

Last Modified

2024-11-21T05:54:34.013

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 7.4 (HIGH)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:N/I:N/A:P

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: PARTIAL
Exploitability Score

6.5

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-119
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application isc dhcp ≤ 4.4.2 Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Application isc dhcp 4.1-esv Yes
Operating System fedoraproject fedora 33 Yes
Operating System fedoraproject fedora 34 Yes
Operating System debian debian_linux 9.0 Yes
Operating System siemens ruggedcom_rox_rx1400_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_rx1400 - No
Operating System siemens ruggedcom_rox_rx1500_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_rx1500 - No
Operating System siemens ruggedcom_rox_rx1501_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_rx1501 - No
Operating System siemens ruggedcom_rox_rx1510_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_rx1510 - No
Operating System siemens ruggedcom_rox_rx1511_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_rx1511 - No
Operating System siemens ruggedcom_rox_rx1512_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_rx1512 - No
Operating System siemens ruggedcom_rox_rx1524_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_rx1524 - No
Operating System siemens ruggedcom_rox_rx1536_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_rx1536 - No
Operating System siemens ruggedcom_rox_rx5000_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_rx5000 - No
Operating System siemens ruggedcom_rox_mx5000_firmware < 2.15.0 Yes
Hardware siemens ruggedcom_rox_mx5000 - No
Application netapp ontap_select_deploy_administration_utility - Yes
Application netapp solidfire_\&_hci_management_node - Yes
Application siemens sinec_ins < 1.0 Yes
Application siemens sinec_ins 1.0 Yes
Application siemens sinec_ins 1.0 Yes
References