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Ubuntu Security Notice USN-5254-1

Ubuntu Security Notice USN-5254-1
Posted Jan 28, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5254-1 - It was discovered that shadow incorrectly handled certain inputs. An attacker could possibly use this issue to cause a crash or expose sensitive information. This issue only affected Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. It was discovered that shadow incorrectly handled certain inputs. An attacker could possibly use this issue to expose sensitive information.

tags | advisory
systems | linux, ubuntu
advisories | CVE-2017-12424, CVE-2018-7169
SHA-256 | 858b88ea3ec43f6082b7cd185a60cc2aa9521c63ecf08ddb13038428d330f54b

Ubuntu Security Notice USN-5254-1

Change Mirror Download
=========================================================================
Ubuntu Security Notice USN-5254-1
January 27, 2022

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

- Ubuntu 18.04 LTS
- Ubuntu 16.04 ESM
- Ubuntu 14.04 ESM

Summary:

Several security issues were fixed in shadow.

Software Description:
- shadow: system login tools

Details:

It was discovered that shadow incorrectly handled certain inputs.
An attacker could possibly use this issue to cause a crash or
expose sensitive information. This issue only affected
Ubuntu 14.04 ESM and Ubuntu 16.04 ESM. (CVE-2017-12424)

It was discovered that shadow incorrectly handled certain inputs.
An attacker could possibly use this issue to expose sensitive information.
(CVE-2018-7169)

Update instructions:

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

Ubuntu 18.04 LTS:
login 1:4.5-1ubuntu2.2
passwd 1:4.5-1ubuntu2.2
uidmap 1:4.5-1ubuntu2.2

Ubuntu 16.04 ESM:
login 1:4.2-3.1ubuntu5.5+esm1
passwd 1:4.2-3.1ubuntu5.5+esm1
uidmap 1:4.2-3.1ubuntu5.5+esm1

Ubuntu 14.04 ESM:
login 1:4.1.5.1-1ubuntu9.5+esm1
passwd 1:4.1.5.1-1ubuntu9.5+esm1
uidmap 1:4.1.5.1-1ubuntu9.5+esm1

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

References:
https://ubuntu.com/security/notices/USN-5254-1
CVE-2017-12424, CVE-2018-7169

Package Information:
https://launchpad.net/ubuntu/+source/shadow/1:4.5-1ubuntu2.2
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