CVE-2020-15137 Integer overflow in HoRNDIS
A malicious USB device can trigger an integer overflow in HoRNDIS, leading to kernel memory disclosure or system crashes on macOS hosts.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2020-15137?
CVE-2020-15137 is a medium-severity vulnerability in jwise HoRNDIS, published on 12 Aug 2020. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
All versions of HoRNDIS are affected by an integer overflow in the RNDIS packet parsing routines. A malicious USB device can trigger disclosure of unrelated kernel memory to userspace applications on the host, or can cause the kernel to crash. Kernel memory disclosure is especially likely on 32-bit kernels; 64-bit kernels are more likely to crash on attempted exploitation. It is not believed that kernel memory corruption is possible, or that unattended kernel memory disclosure without the collaboration of a userspace program running on the host is possible. The vulnerability is in `HoRNDIS::receivePacket`. `msg_len`, `data_ofs`, and `data_len` can be controlled by an attached USB device, and a negative value of `data_ofs` can bypass the check for `(data_ofs + data_len + 8) > msg_len`, and subsequently can cause a wild pointer copy in the `mbuf_copyback` call. The software is not maintained and no patches are planned. Users of multi-tenant systems with HoRNDIS installed should only connect trusted USB devices to their system.
Weakness: CWE-190
Which versions are affected by CVE-2020-15137?
It affects 1 product.
Products include Horndis Project Horndis.
How do I fix CVE-2020-15137?
No fix has been published for CVE-2020-15137 yet. Limit exposure of the affected software until one is available.
Is CVE-2020-15137 being exploited?
There is no known exploitation of CVE-2020-15137 in the wild and no public exploit code.