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CVE-2023-4641

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

MEDIUM
5.5
CVSS Score
Published: December 27, 2023 at 03:43 PM UTC
Updated: June 17, 2026 at 06:38 AM UTC
9 products affected across 2 vendorsEnterprise LinuxEnterprise Linux for IBM Z SystemsEnterprise Linux for Power Little Endian

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Codeready Linux Builder· Red Hat
95%
8.09.0
Codeready Linux Builder for ARM64· Red Hat
95%
8.0_aarch649.0_aarch64
Codeready Linux Builder for IBM Z Systems· Red Hat
95%
8.0_s390x9.0_s390x
Codeready Linux Builder for Power Little Endian· Red Hat
95%
8.0_ppc64le9.0_ppc64le
Enterprise Linux· Red Hatrpm
95%
8.09.0
Vendor states this is fixed in 2:4.6-17.el8_6 (unaffected)
Vendor states this is fixed in 2:4.6-17.el8_8.2 (unaffected)
Vendor states this is fixed in 2:4.6-19.el8 (unaffected)
Vendor states this is fixed in 2:4.9-8.el9 (unaffected)
Vendor states this is fixed in 6 (unknown)
Vendor states this is fixed in 7 (unknown)
Enterprise Linux for Arm 64· Red Hat
95%
8.09.0
Enterprise Linux for IBM Z Systems· Red Hat
95%
8.0_s390x9.0_s390x
Enterprise Linux for Power Little Endian· Red Hat
95%
8.0_ppc64le9.0_ppc64le
Shadow Utils· Shadow Maint
95%
v < 4.14.0
Affected range stops below 4.14.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (7)

Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:6632
Vendor Advisoryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/errata/RHSA-2023:7112
Vendor Advisoryx_refsource_REDHAT
Source: [email protected]
https://access.redhat.com/errata/RHSA-2024:0417
Vendor Advisoryx_refsource_REDHAT
Source: [email protected]
https://access.redhat.com/errata/RHSA-2024:2577
VDB Entryx_refsource_REDHATThird Party Advisory
Source: [email protected]
https://access.redhat.com/security/cve/CVE-2023-4641
Issue Trackingx_refsource_REDHAT
Source: [email protected]
https://bugzilla.redhat.com/show_bug.cgi?id=2215945
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.debian.org/debian-lts-announce/2025/04/msg00026.html

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUM[email protected]
Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-303CWE-287

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