CVE-2021-20286 Denial of service in libnbd
An assertion failure in libnbd allows attackers to cause a denial of service, requiring updates to the library.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2021-20286?
CVE-2021-20286 is a low-severity denial of service vulnerability in Redhat Enterprise Linux, published on 15 Mar 2021. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
A flaw was found in libnbd 1.7.3. An assertion failure in nbd_unlocked_opt_go in ilb/opt.c may lead to denial of service.
Weakness: CWE-617
Which versions are affected by CVE-2021-20286?
It affects 2 products.
Linux distribution packages (5)
containerized-data-importer SUSE:Linux Enterprise Module for Containers 15 SP2 | All versions | 1.30.0-5.3.2 |
kubevirt SUSE:Linux Enterprise Module for Containers 15 SP2 | All versions | 0.40.0-5.11.2 |
kubevirt SUSE:Linux Enterprise Module for Containers 15 SP3 | All versions | 0.40.0-5.11.2 |
kubevirt openSUSE:Leap 15.3 | All versions | 0.40.0-5.11.2 |
libnbd openSUSE:Tumbleweed | All versions | 1.9.3-1.2 |
Products include Redhat Enterprise Linux, Redhat Libnbd.
How do I fix CVE-2021-20286?
Apply the vendor's patch.
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-2021-20286 being exploited?
There is no known exploitation of CVE-2021-20286 in the wild and no public exploit code.
Other vulnerabilities in Redhat Enterprise Linux
- CVE-2018-14667 Red Hat JBoss RichFaces Framework Expression Language Injection
- CVE-2021-20325 Missing fixes for CVE-2021-40438 and CVE-2021-26691 in the versions of httpd, as shipped in Red Hat Enterprise Linux 8.5.0, causes a securit
- CVE-2018-25011 Memory corruption in libwebp
- CVE-2018-25014 Other in libwebp
- CVE-2014-3585 Supply chain in redhat-upgrade-tool
Sources
Also known as AZL-7265, DEBIAN-CVE-2021-20286, GHSA-r4rf-vx7w-8692, SUSE-SU-2021:2274-1, UBUNTU-CVE-2021-20286, openSUSE-SU-2021:2274-1 and 1 more.