CVE-2020-14383 Denial of service in samba
An authenticated user can repeatedly crash the Samba RPC server, disrupting multiple RPC services while the DNS server remains operational.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2020-14383?
CVE-2020-14383 is a medium-severity denial of service vulnerability in Redhat Enterprise Linux, published on 2 Dec 2020. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A flaw was found in samba's DNS server. An authenticated user could use this flaw to the RPC server to crash. This RPC server, which also serves protocols other than dnsserver, will be restarted after a short delay, but it is easy for an authenticated non administrative attacker to crash it again as soon as it returns. The Samba DNS server itself will continue to operate, but many RPC services will not.
Weakness: CWE-391
Which versions are affected by CVE-2020-14383?
It affects 2 products.
Products include Redhat Enterprise Linux, Samba Samba.
How do I fix CVE-2020-14383?
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-2020-14383 being exploited?
There is no known exploitation of CVE-2020-14383 in the wild and no public exploit code.
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- 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 ALPINE-CVE-2020-14383, AZL-36990, AZL-7349, DEBIAN-CVE-2020-14383, ECHO-9156-ce37-b9e6, GHSA-9hpm-fmxg-j5xc and 1 more.