CVE-2022-2928
Published: 5 October 2022
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.
Priority
Status
Package | Release | Status |
---|---|---|
isc-dhcp Launchpad, Ubuntu, Debian |
bionic |
Released
(4.3.5-3ubuntu7.4)
|
focal |
Released
(4.4.1-2.1ubuntu5.20.04.4)
|
|
jammy |
Released
(4.4.1-2.3ubuntu2.3)
|
|
kinetic |
Released
(4.4.3-2ubuntu4)
|
|
trusty |
Released
(4.2.4-7ubuntu12.13+esm2)
|
|
upstream |
Released
(4.4.3-P1,4.1-ESV-R16-P2)
|
|
xenial |
Released
(4.3.3-5ubuntu12.10+esm2)
|
Severity score breakdown
Parameter | Value |
---|---|
Base score | 6.5 |
Attack vector | Adjacent |
Attack complexity | Low |
Privileges required | None |
User interaction | None |
Scope | Unchanged |
Confidentiality | None |
Integrity impact | None |
Availability impact | High |
Vector | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2928
- https://lists.isc.org/pipermail/dhcp-announce/2022-October/000437.html
- https://kb.isc.org/docs/cve-2022-2928
- https://ubuntu.com/security/notices/USN-5658-1
- https://ubuntu.com/security/notices/USN-5658-2
- https://ubuntu.com/security/notices/USN-5658-3
- NVD
- Launchpad
- Debian