CVE-2023-41913
Published: 20 November 2023
strongSwan before 5.9.12 has a buffer overflow and possible unauthenticated remote code execution via a DH public value that exceeds the internal buffer in charon-tkm's DH proxy. The earliest affected version is 5.3.0. An attack can occur via a crafted IKE_SA_INIT message.
Notes
| Author | Note |
|---|---|
| mdeslaur | After the USN was published, it was discovered that the Ubuntu packages aren't built with --enable-tkm, so the vulnerable code isn't built at all. If this is enabled in the future, the jammy and earlier patches (inlcuding esm) need to be fixed to use diffie_hellman_verify_value() instead of key_exchange_verify_pubkey() for those older versions. Marking remaining releases as "not-affected" |
Priority
Status
| Package | Release | Status |
|---|---|---|
|
strongswan Launchpad, Ubuntu, Debian |
bionic |
Released
(5.6.2-1ubuntu2.9+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
| focal |
Released
(5.8.2-1ubuntu3.6)
|
|
| jammy |
Released
(5.9.5-2ubuntu2.2)
|
|
| lunar |
Released
(5.9.8-3ubuntu4.1)
|
|
| mantic |
Released
(5.9.11-1ubuntu1.1)
|
|
| trusty |
Not vulnerable
(code not compiled)
|
|
| upstream |
Released
(5.9.12)
|
|
| xenial |
Released
(5.3.5-1ubuntu3.8+esm4)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only) |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score | 9.8 |
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |