CVE-2019-8656 Security feature bypass in macOS
Attackers can bypass macOS Gatekeeper security checks by exploiting symbolic links in zip files mounted from attacker-controlled NFS shares.
- 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-2019-8656?
CVE-2019-8656 is a medium-severity vulnerability in Apple Mac Os X, published on 27 Oct 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
This was addressed with additional checks by Gatekeeper on files mounted through a network share. This issue is fixed in macOS Mojave 10.14.6, Security Update 2019-004 High Sierra, Security Update 2019-004 Sierra. Extracting a zip file containing a symbolic link to an endpoint in an NFS mount that is attacker controlled may bypass Gatekeeper.
Which versions are affected by CVE-2019-8656?
It affects 1 product.
Products include Apple Mac Os X.
How do I fix CVE-2019-8656?
No fix has been published for CVE-2019-8656 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-8656 being exploited?
There is no known exploitation of CVE-2019-8656 in the wild and no public exploit code.
Public exploit code: 1 proofs of concept on GitHub.
Other vulnerabilities in Apple Mac Os X
Sources
Also known as GHSA-v653-8hvf-5c3m.