In FreeBSD before 11.1-STABLE, 11.1-RELEASE-p7, 10.4-STABLE, 10.4-RELEASE-p7, and 10.3-RELEASE-p28, the kernel does not properly validate IPsec packets coming from a trusted host. Additionally, a use-after-free vulnerability exists in the IPsec AH handling code. This issue could cause a system crash or other unpredictable results.
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Freebsd | Freebsd | 11.0 (including) | 11.1 (excluding) |
| Freebsd | Freebsd | 10.3-p28 (including) | 10.3-p28 (including) |
| Freebsd | Freebsd | 10.4 (including) | 10.4 (including) |
| Freebsd | Freebsd | 10.4-p7 (including) | 10.4-p7 (including) |