CVE-2021-43395 Denial of service in n/a
A local unprivileged user can cause a kernel panic and deadlock via crafted filesystem operations on tmpfs, affecting illumos-based operating systems.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-43395?
CVE-2021-43395 is a medium-severity denial of service vulnerability in Oracle Solaris, published on 26 Dec 2022. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
An issue was discovered in illumos before f859e7171bb5db34321e45585839c6c3200ebb90, OmniOS Community Edition r151038, OpenIndiana Hipster 2021.04, and SmartOS 20210923. A local unprivileged user can cause a deadlock and kernel panic via crafted rename and rmdir calls on tmpfs filesystems. Oracle Solaris 10 and 11 is also affected.
Weakness: CWE-667
Which versions are affected by CVE-2021-43395?
It affects 5 products.
Products include Illumos Illumos, Joyent Smartos, Omniosce Omnios, Openindiana Openindiana, Oracle Solaris.
How do I fix CVE-2021-43395?
No fix has been published for CVE-2021-43395 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2021-43395 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2021-43395 exists.
Other vulnerabilities in Oracle Solaris
Sources
Also known as GHSA-6w9w-8g4v-j4m6.