CVE-2022-2928

 

Published at: - 07-10-2022 07:15

Last modified: - 21-11-2022 08:34

Total changes: - 7

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.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

 

Verification logic

 

Reference

• https://kb.isc.org/docs/cve-2022-2928
• [debian-lts-announce] 20221010 [SECURITY] [DLA 3146-1] isc-dhcp security update-Mailing List, Third Party Advisory
• FEDORA-2022-f5a45757df-Mailing List, Third Party Advisory
• FEDORA-2022-9ca9a94e28-Mailing List, Third Party Advisory
• FEDORA-2022-c4f274a54f-Mailing List, Third Party Advisory

 

Keywords

NVD

 

CVE-2022-2928

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures