CVE-2023-4641

Publication date 27 December 2023

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

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.

Read the notes from the security team

Why is this CVE low priority?

Unlikely attack scenario

Learn more about Ubuntu priority

Status

Show unmaintained releases

Package	Ubuntu Release	Status
shadow	24.10 oracular	Not affected
	24.04 LTS noble	Not affected
	23.10 mantic	Fixed 1:4.13+dfsg1-1ubuntu1.1
	23.04 lunar	Ignored end of life, was needed
	22.04 LTS jammy	Fixed 1:4.8.1-2ubuntu2.2
	20.04 LTS focal	Fixed 1:4.8.1-1ubuntu5.20.04.5
	18.04 LTS bionic	Fixed 1:4.5-1ubuntu2.5+esm1 Ubuntu Pro
	16.04 LTS xenial	Fixed 1:4.2-3.1ubuntu5.5+esm4 Ubuntu Pro
	14.04 LTS trusty	Fixed 1:4.1.5.1-1ubuntu9.5+esm4 Ubuntu Pro

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Notes

alexmurray

Technically this doesn't seem able to be exploitable in practice

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
shadow	Upstream: 65c88a4

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	None
Availability impact	None
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N