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Improper Authentication Affecting shadow package, versions <1:4.2-3.1ubuntu5.5+esm4

low

Snyk CVSS

    Attack Complexity Low
    Confidentiality High

    Threat Intelligence

    EPSS 0.05% (15th percentile)
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NVD
5.5 medium
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SUSE
3.3 low
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Red Hat
4.7 medium

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  • Snyk ID SNYK-UBUNTU1604-SHADOW-5879191
  • published 6 Feb 2024
  • disclosed 27 Dec 2023
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Introduced: 27 Dec 2023

CVE-2023-4641 Open this link in a new tab
CWE-287 Open this link in a new tab

How to fix?

Upgrade Ubuntu:16.04 shadow to version 1:4.2-3.1ubuntu5.5+esm4 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shadow package and not the shadow package as distributed by Ubuntu. See How to fix? for Ubuntu:16.04 relevant fixed versions and status.

A flaw was found in shadow-utils. When asking for a new password, shadow-utils asks the password twice. If the password fails on the second attempt, shadow-utils fails in cleaning the buffer used to store the first entry. This may allow an attacker with enough access to retrieve the password from the memory.