The decompression algorithm in zlib 1.1.3 and earlier, as used in many different utilities and packages, causes inflateEnd to release certain memory more than once (a double free), which may allow local and remote attackers to execute arbitrary code via a block of malformed compression data.
The product calls free() twice on the same memory address, potentially leading to modification of unexpected memory locations.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Zlib | Zlib | * | 1.1.3 (including) |
| Red Hat Linux 6.2 | RedHat | * | |
| Red Hat Linux 7.0 | RedHat | * | |
| Red Hat Linux 7.1 | RedHat | * | |
| Red Hat Linux 7.2 | RedHat | * | |
| Red Hat Powertools 6.2 | RedHat | * | |
| Red Hat Powertools 7.0 | RedHat | * | |
| Red Hat Powertools 7.1 | RedHat | * |