USN-5254-1: shadow vulnerabilities
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Ubuntu Security Notice USN-5254-1
January 27, 2022
shadow vulnerabilities
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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
A shadow security update has been released for Ubuntu Linux 14.04 ESM, 16.04 ESM, and 18.04 LTS.
