==========================================================================
Ubuntu Security Notice USN-6640-1
February 15, 2024

shadow vulnerability
==========================================================================

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

- Ubuntu 23.10
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS (Available with Ubuntu Pro)
- Ubuntu 16.04 LTS (Available with Ubuntu Pro)
- Ubuntu 14.04 LTS (Available with Ubuntu Pro)

Summary:

shadow could be made to expose sensitive information.

Software Description:
- shadow: system login tools

Details:

It was discovered that shadow was not properly sanitizing memory when
running the password utility. An attacker could possibly use this issue
to retrieve a password from memory, exposing sensitive information.

Update instructions:

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

Ubuntu 23.10:
libsubid-dev 1:4.13+dfsg1-1ubuntu1.1
libsubid4 1:4.13+dfsg1-1ubuntu1.1
login 1:4.13+dfsg1-1ubuntu1.1
passwd 1:4.13+dfsg1-1ubuntu1.1
uidmap 1:4.13+dfsg1-1ubuntu1.1

Ubuntu 22.04 LTS:
login 1:4.8.1-2ubuntu2.2
passwd 1:4.8.1-2ubuntu2.2
uidmap 1:4.8.1-2ubuntu2.2

Ubuntu 20.04 LTS:
login 1:4.8.1-1ubuntu5.20.04.5
passwd 1:4.8.1-1ubuntu5.20.04.5
uidmap 1:4.8.1-1ubuntu5.20.04.5

Ubuntu 18.04 LTS (Available with Ubuntu Pro):
login 1:4.5-1ubuntu2.5+esm1
passwd 1:4.5-1ubuntu2.5+esm1
uidmap 1:4.5-1ubuntu2.5+esm1

Ubuntu 16.04 LTS (Available with Ubuntu Pro):
login 1:4.2-3.1ubuntu5.5+esm4
passwd 1:4.2-3.1ubuntu5.5+esm4
uidmap 1:4.2-3.1ubuntu5.5+esm4

Ubuntu 14.04 LTS (Available with Ubuntu Pro):
login 1:4.1.5.1-1ubuntu9.5+esm4
passwd 1:4.1.5.1-1ubuntu9.5+esm4
uidmap 1:4.1.5.1-1ubuntu9.5+esm4

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

References:
https://ubuntu.com/security/notices/USN-6640-1
CVE-2023-4641

Package Information:
https://launchpad.net/ubuntu/+source/shadow/1:4.13+dfsg1-1ubuntu1.1
https://launchpad.net/ubuntu/+source/shadow/1:4.8.1-2ubuntu2.2
https://launchpad.net/ubuntu/+source/shadow/1:4.8.1-1ubuntu5.20.04.5

Ubuntu 6640-1: shadow vulnerability

February 15, 2024
shadow could be made to expose sensitive information.

Summary

A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 23.10 - Ubuntu 22.04 LTS - Ubuntu 20.04 LTS - Ubuntu 18.04 LTS (Available with Ubuntu Pro) - Ubuntu 16.04 LTS (Available with Ubuntu Pro) - Ubuntu 14.04 LTS (Available with Ubuntu Pro) Summary: shadow could be made to expose sensitive information. Software Description: - shadow: system login tools Details: It was discovered that shadow was not properly sanitizing memory when running the password utility. An attacker could possibly use this issue to retrieve a password from memory, exposing sensitive information.

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 23.10: libsubid-dev 1:4.13+dfsg1-1ubuntu1.1 libsubid4 1:4.13+dfsg1-1ubuntu1.1 login 1:4.13+dfsg1-1ubuntu1.1 passwd 1:4.13+dfsg1-1ubuntu1.1 uidmap 1:4.13+dfsg1-1ubuntu1.1 Ubuntu 22.04 LTS: login 1:4.8.1-2ubuntu2.2 passwd 1:4.8.1-2ubuntu2.2 uidmap 1:4.8.1-2ubuntu2.2 Ubuntu 20.04 LTS: login 1:4.8.1-1ubuntu5.20.04.5 passwd 1:4.8.1-1ubuntu5.20.04.5 uidmap 1:4.8.1-1ubuntu5.20.04.5 Ubuntu 18.04 LTS (Available with Ubuntu Pro): login 1:4.5-1ubuntu2.5+esm1 passwd 1:4.5-1ubuntu2.5+esm1 uidmap 1:4.5-1ubuntu2.5+esm1 Ubuntu 16.04 LTS (Available with Ubuntu Pro): login 1:4.2-3.1ubuntu5.5+esm4 passwd 1:4.2-3.1ubuntu5.5+esm4 uidmap 1:4.2-3.1ubuntu5.5+esm4 Ubuntu 14.04 LTS (Available with Ubuntu Pro): login 1:4.1.5.1-1ubuntu9.5+esm4 passwd 1:4.1.5.1-1ubuntu9.5+esm4 uidmap 1:4.1.5.1-1ubuntu9.5+esm4 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-6640-1

CVE-2023-4641

Severity
Ubuntu Security Notice USN-6640-1

Package Information

https://launchpad.net/ubuntu/+source/shadow/1:4.13+dfsg1-1ubuntu1.1 https://launchpad.net/ubuntu/+source/shadow/1:4.8.1-2ubuntu2.2 https://launchpad.net/ubuntu/+source/shadow/1:4.8.1-1ubuntu5.20.04.5

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