CVE-2023-38802
Published: 28 August 2023
FRRouting FRR 7.5.1 through 9.0 and Pica8 PICOS 4.3.3.2 allow a remote attacker to cause a denial of service via a crafted BGP update with a corrupted attribute 23 (Tunnel Encapsulation).
Notes
| Author | Note |
|---|---|
| sbeattie | VINCE #1159 |
| eslerm | frr merged patch on 2023-08-29 bcb6b58d9 ("bgpd:
Use treat-as-withdraw for tunnel encapsulation attribute")
quagga does not implement RFC 7606 |
| mdeslaur | This was actually fixed in USN-6323-1, but was not listed because of a copy/paste error |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
frr Launchpad, Ubuntu, Debian |
bionic |
Does not exist
|
| focal |
Needs triage
|
|
| jammy |
Released
(8.1-1ubuntu1.5)
|
|
| lunar |
Released
(8.4.2-1ubuntu1.3)
|
|
| mantic |
Not vulnerable
(8.4.4-1.1ubuntu1)
|
|
| noble |
Not vulnerable
(8.4.4-1.1ubuntu1)
|
|
| trusty |
Does not exist
|
|
| upstream |
Released
(8.4.4-1.1)
|
|
| xenial |
Does not exist
|
|
|
Patches: upstream: https://github.com/FRRouting/frr/commit/bcb6b58d9530173df41d3a3cbc4c600ee0b4b186 |
||
|
quagga Launchpad, Ubuntu, Debian |
bionic |
Not vulnerable
(code not present)
|
| focal |
Not vulnerable
(code not present)
|
|
| jammy |
Does not exist
|
|
| lunar |
Does not exist
|
|
| mantic |
Does not exist
|
|
| noble |
Does not exist
|
|
| trusty |
Ignored
(end of standard support)
|
|
| upstream |
Not vulnerable
(code not present)
|
|
| xenial |
Not vulnerable
(code not present)
|
|
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 7.5 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | None |
| Integrity impact | None |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
References
- https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling
- https://kb.cert.org/vuls/id/347067
- https://blog.benjojo.co.uk/post/bgp-path-attributes-grave-error-handling
- https://ubuntu.com/security/notices/USN-6323-1
- https://www.cve.org/CVERecord?id=CVE-2023-38802
- NVD
- Launchpad
- Debian