CVE-2019-9917 Denial of service in n/a

What is CVE-2019-9917?

CVE-2019-9917 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 27 Mar 2019. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

ZNC before 1.7.3-rc1 allows an existing remote user to cause a Denial of Service (crash) via invalid encoding.

Weakness: CWE-20

Which versions are affected by CVE-2019-9917?

It affects 3 products.

Products include Canonical Ubuntu Linux, Fedoraproject Fedora, Znc Znc.

How do I fix CVE-2019-9917?

Upgrade to a fixed version.

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-2019-9917 being exploited?

There is no known exploitation of CVE-2019-9917 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 ALPINE-CVE-2019-9917, DEBIAN-CVE-2019-9917, GHSA-qwh2-7wpp-c8p6, UBUNTU-CVE-2019-9917, openSUSE-SU-2019:1166-1.