In FreeBSD before 11.0-STABLE, 11.0-RELEASE-p10, 10.3-STABLE, and 10.3-RELEASE-p19, ipfilter using keep state or keep frags options can cause a kernel panic when fed specially crafted packet fragments due to incorrect memory handling.
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 Any operations using the original pointer are no longer valid because the memory “belongs” to the code that operates on the new pointer.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) |
Freebsd | Freebsd | 10.3 (including) | 10.3 (including) |
Freebsd | Freebsd | 10.3-p19 (including) | 10.3-p19 (including) |
Freebsd | Freebsd | 11.0-p10 (including) | 11.0-p10 (including) |