CVE-2019-6743 Memory corruption in Browser
Remote attackers can execute arbitrary code via a heap buffer overflow in the WebAssembly.Instance method when users visit malicious pages.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2019-6743?
CVE-2019-6743 is a high-severity memory corruption vulnerability in Xiaomi Browser, published on 3 Jun 2019. 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
This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Xiaomi Mi6 Browser prior to 10.4.0. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file. The specific flaw exists within the WebAssembly.Instance method. The issue results from the lack of proper validation of user-supplied data, which can result in a write past the end of a heap-based buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-7466.
Weakness: CWE-787
Which versions are affected by CVE-2019-6743?
It affects 1 product.
Products include Mi Mi6 Browser.
How do I fix CVE-2019-6743?
No fix has been published for CVE-2019-6743 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2019-6743 being exploited?
There is no known exploitation of CVE-2019-6743 in the wild and no public exploit code.
Sources
Also known as GHSA-64gc-xrvh-3pxm.