CVE-2019-18808 Denial of service in n/a

What is CVE-2019-18808?

CVE-2019-18808 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 7 Nov 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A memory leak in the ccp_run_sha_cmd() function in drivers/crypto/ccp/ccp-ops.c in the Linux kernel through 5.3.9 allows attackers to cause a denial of service (memory consumption), aka CID-128c66429247.

Weakness: CWE-401

Which versions are affected by CVE-2019-18808?

It affects 4 products.

Products include Canonical Ubuntu Linux, Fedoraproject Fedora, Linux kernel, Opensuse Leap.

How do I fix CVE-2019-18808?

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-2019-18808 being exploited?

There is no known exploitation of CVE-2019-18808 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 DEBIAN-CVE-2019-18808, GHSA-c269-fcrm-h58r, UBUNTU-CVE-2019-18808.