CVE-2018-18898 Denial of service in n/a

High 7.5 Published 17 Mar 2019 Updated 5 Aug 2024

Remote attackers can cause denial of service in Request Tracker via an algorithmic complexity attack on email address parsing.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2018-18898?

CVE-2018-18898 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 17 Mar 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

The email-ingestion feature in Best Practical Request Tracker 4.1.13 through 4.4 allows denial of service by remote attackers via an algorithmic complexity attack on email address parsing.

Weakness: CWE-400

Which versions are affected by CVE-2018-18898?

It affects 4 products.

Products include Bestpractical Request Tracker, Canonical Ubuntu Linux, Debian Debian Linux, Fedoraproject Fedora.

How do I fix CVE-2018-18898?

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-2018-18898 being exploited?

There is no known exploitation of CVE-2018-18898 in the wild and no public exploit code.

All Canonical Ubuntu Linux vulnerabilities

Sources

Also known as ALPINE-CVE-2018-18898, DEBIAN-CVE-2018-18898, DLA-2101-1, GHSA-6rmj-6826-5j8h, UBUNTU-CVE-2018-18898, USN-4517-1.