Attacker Value
Unknown
(0 users assessed)
Exploitability
Unknown
(0 users assessed)
User Interaction
None
Privileges Required
None
Attack Vector
Adjacent_network
0

CVE-2022-2928

Disclosure Date: October 05, 2022 •
CVE-2022-2928 CVSS v3 Base Score: 6.5
Add MITRE ATT&CK tactics and techniques that apply to this CVE.

Description

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.

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CVSS V3 Severity and Metrics
Base Score:
6.5 Medium
Impact Score:
3.6
Exploitability Score:
2.8
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack Vector (AV):
Adjacent_network
Attack Complexity (AC):
Low
Privileges Required (PR):
None
User Interaction (UI):
None
Scope (S):
Unchanged
Confidentiality (C):
None
Integrity (I):
None
Availability (A):
High

General Information

Offensive Application
Unknown
Utility Class
Unknown
Ports
Unknown
OS
Unknown
Vulnerable Versions
ISC DHCP 4.4.0 through versions before 4.4.3-P1
ISC DHCP 4.1-ESV-R1 through versions before 4.1-ESV-R16-P1
Prerequisites
Unknown
Discovered By
Unknown
PoC Author
Unknown
Metasploit Module
Unknown
Reporter
Unknown

Vendors

  • debian,
  • fedoraproject,
  • isc

Products

  • debian linux 10.0,
  • dhcp,
  • dhcp 4.1-esv,
  • fedora 35,
  • fedora 36,
  • fedora 37
Technical Analysis