A memory leak in the ath9k_wmi_cmd() function in drivers/net/wireless/ath/ath9k/wmi.c in the Linux kernel through 5.3.11 allows attackers to cause a denial of service (memory consumption), aka CID-728c1e2a05e4.
Weakness
The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory.
Affected Software
Name |
Vendor |
Start Version |
End Version |
Linux_kernel |
Linux |
* |
4.4.233 (excluding) |
Linux_kernel |
Linux |
4.5 (including) |
4.9.233 (excluding) |
Linux_kernel |
Linux |
4.10 (including) |
4.14.192 (excluding) |
Linux_kernel |
Linux |
4.15 (including) |
4.19.137 (excluding) |
Linux_kernel |
Linux |
4.20 (including) |
5.4 (excluding) |
Potential Mitigations
- Choose a language or tool that provides automatic memory management, or makes manual memory management less error-prone.
- For example, glibc in Linux provides protection against free of invalid pointers.
- When using Xcode to target OS X or iOS, enable automatic reference counting (ARC) [REF-391].
- To help correctly and consistently manage memory when programming in C++, consider using a smart pointer class such as std::auto_ptr (defined by ISO/IEC ISO/IEC 14882:2003), std::shared_ptr and std::unique_ptr (specified by an upcoming revision of the C++ standard, informally referred to as C++ 1x), or equivalent solutions such as Boost.
References