CVE-2022-40318
Published: 3 May 2023
An issue was discovered in bgpd in FRRouting (FRR) through 8.4. By crafting a BGP OPEN message with an option of type 0xff (Extended Length from RFC 9072), attackers may cause a denial of service (assertion failure and daemon restart, or out-of-bounds read). This is possible because of inconsistent boundary checks that do not account for reading 3 bytes (instead of 2) in this 0xff case. NOTE: this behavior occurs in bgp_open_option_parse in the bgp_open.c file, a different location (with a different attack vector) relative to CVE-2022-40302.
Notes
| Author | Note |
|---|---|
| mdeslaur | Commits below fix CVE-2022-40302, CVE-2022-40318, CVE-2022-43681 Introduced by https://github.com/FRRouting/frr/commit/d08c0c8077fbb3e100ed2e87927edec1a09d224b |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
frr Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Not vulnerable
(7.2.1-1ubuntu0.2)
|
|
| jammy |
Not vulnerable
(8.1-1ubuntu1.3)
|
|
| kinetic |
Not vulnerable
(8.1-1ubuntu3.1)
|
|
| lunar |
Not vulnerable
(8.4.2-1ubuntu1)
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Needs triage
|
|
| xenial |
Ignored
(end of standard support)
|
|
|
Patches: upstream: https://github.com/FRRouting/frr/commit/1117baca3c592877a4d8a13ed6a1d9bd83977487 upstream: https://github.com/FRRouting/frr/commit/3e46b43e3788f0f87bae56a86b54d412b4710286 upstream: https://github.com/FRRouting/frr/commit/766eec1b7accffe2c04a5c9ebb14e9f487bb9f78 |
||
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 6.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | Low |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |