1. Ubuntu Security Notices
  2. USN-4569-1

USN-4569-1: Yaws vulnerabilities

Publication date

5 October 2020

Overview

Several security issues were fixed in Yaws.

Releases

Packages

  • yaws - High performance HTTP 1.1 webserver written in Erlang

Details

It was discovered that Yaws did not properly sanitize XML input. A remote
attacker could use this vulnerability to execute an XML External Entity
(XXE) injection attack. (CVE-2020-24379)

It was discovered that Yaws mishandled certain input when running CGI
scripts. A remote attacker could use this vulnerability to execute
arbitrary commands. (CVE-2020-24916)

It was discovered that Yaws did not properly sanitize XML input. A remote
attacker could use this vulnerability to execute an XML External Entity
(XXE) injection attack. (CVE-2020-24379)

It was discovered that Yaws mishandled certain input when running CGI
scripts. A remote attacker could use this vulnerability to execute
arbitrary commands. (CVE-2020-24916)

Update instructions

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

Learn more about how to get the fixes.

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

Ubuntu Release Package Version
18.04 bionic erlang-yapp –  2.0.4+dfsg-2ubuntu0.1
erlang-yaws –  2.0.4+dfsg-2ubuntu0.1
yaws –  2.0.4+dfsg-2ubuntu0.1
yaws-mail –  2.0.4+dfsg-2ubuntu0.1

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References

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