CVE-2023-4641
Shadow-utils: possible password leak during passwd(1) change
No known exploitation. EPSS puts it in the 15th percentile. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Not in the catalog. CISA has not confirmed exploitation.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
0.3% chance of exploitation activity in the next 30 days, which ranks it in the 15th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
6 events over 911 days, from the signal feeds we watch.
- OpenVAS check added
- Patch availablerecord updated
- Publishedweakness classified, att&ck mapped
Affected products
- Red Hat Enterprise Linux 8Operating Systems / linux-distro
- Red Hat Enterprise Linux 8.6 Extended Update SupportOperating Systems / linux-distro
- Red Hat Enterprise Linux 8.8 Extended Update SupportOperating Systems / linux-distro
- codeready linux builderOperating Systems / linux-distro
- codeready linux builder for arm64Operating Systems / linux-distro
- codeready linux builder for ibm z systemsOperating Systems / linux-distro
- codeready linux builder for power little endianOperating Systems / linux-distro
- enterprise linux for arm 64Operating Systems / linux-distro
And 9 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Scored 4.7 by NVD.
How it is reached
- Attack Vector LocalRequires local access to the vulnerable system (e.g. local login, malicious file)
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required LowRequires basic user-level privileges
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope UnchangedImpact is limited to the vulnerable component itself
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity NoneNo integrity impact
- Availability NoneNo availability impact
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- github.com/shadow-maint/shadow/commit/65c88a43a23c2391dcc90c0abda3e839e9c57904&
- redos.red-soft.ru/support/secure/&
- access.redhat.com/security/cve/CVE-2023-4641
And 11 more references. See all after sign-in
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