CVE-2022-28733
Published: 20 July 2023
Integer underflow in grub_net_recv_ip4_packets; A malicious crafted IP packet can lead to an integer underflow in grub_net_recv_ip4_packets() function on rsm->total_len value. Under certain circumstances the total_len value may end up wrapping around to a small integer number which will be used in memory allocation. If the attack succeeds in such way, subsequent operations can write past the end of the buffer.
Notes
| Author | Note |
|---|---|
| eslerm | CWE-191 |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
grub2-unsigned Launchpad, Ubuntu, Debian |
trusty |
Does not exist
|
| xenial |
Needed
|
|
| bionic |
Pending
(2.06-2ubuntu14.1)
|
|
| focal |
Pending
(2.06-2ubuntu14.1)
|
|
| jammy |
Pending
(2.06-2ubuntu14.1)
|
|
| kinetic |
Ignored
(end of life)
|
|
| lunar |
Not vulnerable
(2.06-2ubuntu16)
|
|
| upstream |
Needs triage
|
|
|
grub2-signed Launchpad, Ubuntu, Debian |
trusty |
Needs triage
|
| xenial |
Needed
|
|
| bionic |
Pending
(1.187.3~18.04.1)
|
|
| focal |
Pending
(1.187.3~20.04.1)
|
|
| jammy |
Pending
(1.187.3~22.04.1)
|
|
| kinetic |
Ignored
(end of life)
|
|
| lunar |
Not vulnerable
(1.192)
|
|
| upstream |
Needs triage
|
|
|
grub2 Launchpad, Ubuntu, Debian |
lunar |
Not vulnerable
(2.06-2ubuntu16)
|
| kinetic |
Not vulnerable
(2.06-2ubuntu12)
|
|
| upstream |
Released
(2.06-3)
|
|
| impish |
Ignored
(end of life)
|
|
| bionic |
Needed
|
|
| focal |
Needed
|
|
| jammy |
Needed
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 8.1 |
| Attack vector | Network |
| Attack complexity | High |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |