An incomplete guard in OpenVPN 2.6.0 through 2.6.20 and 2.7_alpha1 through 2.7.4 allows remote authenticated peers to trigger a use-after-free during TLS session promotion, potentially leading to a denial of service or memory leakage
Weakness
The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Openvpn | Openvpn | 2.6.0 (including) | 2.6.21 (excluding) |
| Openvpn | Openvpn | 2.7 (including) | 2.7.5 (excluding) |
| Openvpn | Ubuntu | devel | * |
| Openvpn | Ubuntu | noble | * |
| Openvpn | Ubuntu | questing | * |
| Openvpn | Ubuntu | resolute | * |
| Openvpn | Ubuntu | upstream | * |