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Ubuntu Security Notice USN-4562-2
October 26, 2020

ruby-kramdown vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

– Ubuntu 20.10

Summary:

kramdown could be made to crash, run programs, or leak sensitive information if
it opened a specially crafted file.

Software Description:
– ruby-kramdown: Fast, pure-Ruby Markdown-superset converter – ruby library

Details:

It was discovered that kramdown insecurely handled certain crafted input. An
attacker could use this vulnerability to read restricted files or execute
arbitrary code.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 20.10:
kramdown 1.17.0-4ubuntu0.20.10.1
ruby-kramdown 1.17.0-4ubuntu0.20.10.1

In general, a standard system update will make all the necessary changes.

References:
https://usn.ubuntu.com/4562-2
https://usn.ubuntu.com/4562-1
CVE-2020-14001

Package Information:
https://launchpad.net/ubuntu/+source/ruby-kramdown/1.17.0-4ubuntu0.20.10.1

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