An underscore security update has been released for Ubuntu Linux 14.04 ESM, 16.04 LTS, 18.04 LTS, 20.04 LTS, and 20.10.

USN-4913-1: Underscore vulnerability

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Ubuntu Security Notice USN-4913-1
April 14, 2021

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

- Ubuntu 20.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 ESM

Summary:

Underscore could be made to inject arbitrary code if it received a specially
crafted input.

Software Description:
- underscore: None

Details:

It was discovered that Underscore incorrectly handled certain inputs.
An attacker could possibly use this issue to inject arbitrary code.

Update instructions:

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

Ubuntu 20.10:
libjs-underscore 1.9.1~dfsg-1ubuntu0.20.10.1
node-underscore 1.9.1~dfsg-1ubuntu0.20.10.1

Ubuntu 20.04 LTS:
libjs-underscore 1.9.1~dfsg-1ubuntu0.20.04.1
node-underscore 1.9.1~dfsg-1ubuntu0.20.04.1

Ubuntu 18.04 LTS:
libjs-underscore 1.8.3~dfsg-1ubuntu0.1
node-underscore 1.8.3~dfsg-1ubuntu0.1

Ubuntu 16.04 LTS:
libjs-underscore 1.7.0~dfsg-1ubuntu1.1
node-underscore 1.7.0~dfsg-1ubuntu1.1

Ubuntu 14.04 ESM:
libjs-underscore 1.4.4-2ubuntu1+esm1
node-underscore 1.4.4-2ubuntu1+esm1

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

References:
  https://ubuntu.com/security/notices/USN-4913-1
CVE-2021-23358

Package Information:
  https://launchpad.net/ubuntu/+source/underscore/1.9.1~dfsg-1ubuntu0.20.10.1
  https://launchpad.net/ubuntu/+source/underscore/1.9.1~dfsg-1ubuntu0.20.04.1
  https://launchpad.net/ubuntu/+source/underscore/1.8.3~dfsg-1ubuntu0.1
  https://launchpad.net/ubuntu/+source/underscore/1.7.0~dfsg-1ubuntu1.1