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CVE-2023-4641— Shadow-utils: possible password leak during passwd(1) change

Quick assessment

Affected

Red Hat Red Hat Enterprise Linux 8

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

shadow是一套用于维护Debian系统的工具套件。 shadow-utils存在安全漏洞，该漏洞源于无法清理用于存储第一个条目的缓冲区，这可能允许具有足够访问权限的攻击者从内存中检索密码。

CVSS 4.7 · Medium EPSS 0.26% · P17 Updated Feb 26, 2026

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys

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I. Basic Information for CVE-2023-4641

Vulnerability Information

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Vulnerability Title

Shadow-utils: possible password leak during passwd(1) change

Source: CVE Program / CVE List V5

Vulnerability Description

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.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Source: CVE Program / CVE List V5

Vulnerability Type

认证算法的不正确实现

Source: CVE Program / CVE List V5

Vulnerability Title

shadow 安全漏洞

Source: CNNVD (China National Vulnerability Database)

Vulnerability Description

Source: CNNVD (China National Vulnerability Database)

CVSS Information

N/A

Source: CNNVD (China National Vulnerability Database)

Vulnerability Type

N/A

Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor	Product	Affected Versions	CPE
Red Hat	Red Hat Enterprise Linux 8	2:4.6-19.el8 ~ *	`cpe:/a:redhat:enterprise_linux:8::crb`
Red Hat	Red Hat Enterprise Linux 8.6 Extended Update Support	2:4.6-17.el8_6 ~ *	`cpe:/o:redhat:rhel_eus:8.6::baseos`
Red Hat	Red Hat Enterprise Linux 8.8 Extended Update Support	2:4.6-17.el8_8.2 ~ *	`cpe:/o:redhat:rhel_eus:8.8::baseos`
Red Hat	Red Hat Enterprise Linux 9	2:4.9-8.el9 ~ *	`cpe:/a:redhat:enterprise_linux:9::crb`
Red Hat	Red Hat Enterprise Linux 6	-	`cpe:/o:redhat:enterprise_linux:6`
Red Hat	Red Hat Enterprise Linux 7	-	`cpe:/o:redhat:enterprise_linux:7`

II. Public POCs for CVE-2023-4641

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2023-4641

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Vendor Advisories for CVE-2023-4641 (6)

https://access.redhat.com/security/cve/CVE-2023-4641 vdb-entry x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2215945 issue-tracking x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:2577 vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2024:0417 vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:6632 vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2023:7112 vendor-advisory x_refsource_REDHAT

https://www.cve.org/CVERecord?id=CVE-2023-4641

IV. Related Vulnerabilities

Same weakness: CWE-303