CVE-2019-3821 Denial of service in ceph

What is CVE-2019-3821?

CVE-2019-3821 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 27 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A flaw was found in the way civetweb frontend was handling requests for ceph RGW server with SSL enabled. An unauthenticated attacker could create multiple connections to ceph RADOS gateway to exhaust file descriptors for ceph-radosgw service resulting in a remote denial of service.

Weakness: CWE-772

Which versions are affected by CVE-2019-3821?

It affects 2 products.

Products include Canonical Ubuntu Linux, Ceph Civetweb.

How do I fix CVE-2019-3821?

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-2019-3821 being exploited?

There is no known exploitation of CVE-2019-3821 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-24mx-5rm6-qcm5.