CVE-2023-4641

Publication date 27 December 2023

Last updated 24 July 2024


Ubuntu priority

Cvss 3 Severity Score

5.5 · Medium

Score breakdown

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

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
16.04 LTS xenial
14.04 LTS trusty

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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

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

References

Related Ubuntu Security Notices (USN)

    • USN-6640-1
    • shadow vulnerability
    • 15 February 2024

Other references