CVE-2018-18409 Denial of service in n/a

What is CVE-2018-18409?

CVE-2018-18409 is a medium-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 17 Oct 2018. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

A stack-based buffer over-read exists in setbit() at iptree.h of TCPFLOW 1.5.0, due to received incorrect values causing incorrect computation, leading to denial of service during an address_histogram call or a get_histogram call.

Weakness: CWE-125

Which versions are affected by CVE-2018-18409?

It affects 3 products.

Products include Canonical Ubuntu Linux, Digitalcorpora Tcpflow, Fedoraproject Fedora.

How do I fix CVE-2018-18409?

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-2018-18409 being exploited?

There is no known exploitation of CVE-2018-18409 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-2018-18409, DEBIAN-CVE-2018-18409, GHSA-5xhp-rfv2-8345, MGASA-2019-0264, UBUNTU-CVE-2018-18409.