An Invalid Pointer vulnerability exists in GNU patch 2.7 via the another_hunk function, which causes a Denial of Service.
Weakness
The product attempts to return a memory resource to the system, but it calls the wrong release function or calls the appropriate release function incorrectly.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Patch | Gnu | 2.7 (including) | 2.7 (including) |
| Patch | Ubuntu | bionic | * |
| Patch | Ubuntu | focal | * |
| Patch | Ubuntu | hirsute | * |
| Patch | Ubuntu | impish | * |
| Patch | Ubuntu | kinetic | * |
| Patch | Ubuntu | lunar | * |
| Patch | Ubuntu | mantic | * |
| Patch | Ubuntu | oracular | * |
| Patch | Ubuntu | plucky | * |
| Patch | Ubuntu | trusty | * |
| Patch | Ubuntu | trusty/esm | * |
| Patch | Ubuntu | xenial | * |
Extended Description
This weakness can take several forms, such as:
Potential Mitigations
- Use a vetted library or framework that does not allow this weakness to occur or provides constructs that make this weakness easier to avoid.
- For example, glibc in Linux provides protection against free of invalid pointers.