CVE-2018-6196 Denial of service in n/a

What is CVE-2018-6196?

CVE-2018-6196 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 25 Jan 2018. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

w3m through 0.5.3 is prone to an infinite recursion flaw in HTMLlineproc0 because the feed_table_block_tag function in table.c does not prevent a negative indent value.

Weakness: CWE-835

Which versions are affected by CVE-2018-6196?

It affects 2 products.

Products include Canonical Ubuntu Linux, Tats W3m.

How do I fix CVE-2018-6196?

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-2018-6196 being exploited?

There is no known exploitation of CVE-2018-6196 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-2018-6196, DEBIAN-CVE-2018-6196, GHSA-rhw8-jfw3-7w97, UBUNTU-CVE-2018-6196.