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Ubuntu Security Notice USN-4338-2
April 28, 2020

re2c vulnerability
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A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 20.04 LTS

Summary:

re2c could be made to execute arbitrary code if it received
a specially crafted file.

Software Description:
- re2c: tool for generating fast C-based recognizers

Details:

USN-4338-1 fixed vulnerabilities in re2c. This update provides
the corresponding update for Ubuntu 20.04 LTS.

Original advisory details:

 Agostino Sarubbo discovered that re2c incorrectly handled certain files.
 An attacker could possibly use this issue to execute arbitrary code.

Update instructions:

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

Ubuntu 20.04 LTS:
  re2c                            1.3-1ubuntu0.1

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

References:
  https://usn.ubuntu.com/4338-2
  https://usn.ubuntu.com/4338-1
  CVE-2020-11958

Package Information:
  https://launchpad.net/ubuntu/+source/re2c/1.3-1ubuntu0.1