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Vulnerability Assessment

Weakness
CWE
Impact

CVSS score of 10.0 (CRITICAL). Attack characteristics: network attack vector, low complexity. Public proof-of-concept exploit code is available. EPSS exploitation probability: 90.70%.

Exploit ScenarioDerived

This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the critical-severity affected system.

Emergency Immediate action required. Why: CRITICAL + EPSS > 30%, no patch available.
No patch listed yet 90.7% exploitation probability (EPSS)

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AnalysisAI

The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x before 4.0.25, 4.1.x before 4.1.17, and 4.2.x before 4.2.0rc5 performs a free operation on an uninitialized. Rated critical severity (CVSS 10.0), this vulnerability is remotely exploitable, low attack complexity. Public exploit code available and EPSS exploitation probability 90.7%.

RemediationAI

No vendor patch is available at time of analysis. Monitor vendor advisories for updates. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

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Technical ContextAI · show details

This vulnerability is classified under CWE-17. The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x before 4.0.25, 4.1.x before 4.1.17, and 4.2.x before 4.2.0rc5 performs a free operation on an uninitialized stack pointer, which allows remote attackers to execute arbitrary code via crafted Netlogon packets that use the ServerPasswordSet RPC API, as demonstrated by packets reaching the _netr_ServerPasswordSet function in rpc_server/netlogon/srv_netlog_nt.c. Affected products include: Redhat Enterprise Linux, Samba, Novell Suse Linux Enterprise Desktop, Novell Suse Linux Enterprise Server, Novell Suse Linux Enterprise Software Development Kit. Version information: before 3.6.25.

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  • Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 10.0 CRITICAL
AV:N/AC:L/Au:N/C:C/I:C/A:C

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector
Network
Attack Complexity
Low
Confidentiality
C
Integrity
C
Availability
C

DescriptionCVE.org

The Netlogon server implementation in smbd in Samba 3.5.x and 3.6.x before 3.6.25, 4.0.x before 4.0.25, 4.1.x before 4.1.17, and 4.2.x before 4.2.0rc5 performs a free operation on an uninitialized stack pointer, which allows remote attackers to execute arbitrary code via crafted Netlogon packets that use the ServerPasswordSet RPC API, as demonstrated by packets reaching the _netr_ServerPasswordSet function in rpc_server/netlogon/srv_netlog_nt.c.

Threat Intelligence Overview

Threat Score
6.2/10
Composite threat intelligence
EPSS Score
90.7%
Top 0% exploitable
Exploit
POC
Public exploit code exists
Data Quality
4 sources
Confidence: Medium

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue
Severity CRITICAL
CISA KEV No
Public POC Yes
EPSS 90.7%
Patch available No
Active threat Yes
Deciding rule
CRITICAL + EPSS > 30%, no patch available
What every action level means
Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.
Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.
This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.
This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.
Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived
Scheduled
Exploitation· derived
Poc
System Exposure· derived
Open
Automatable· derived
No
Human Impact· derived
Medium

Priority Score

161
Low Medium High Critical
KEV: 0
EPSS: +91
CVSS: +50
PoC: +20
Weaponized: 0
Threat intel: 0
Gov advisory: 0

Attack Technique

Remote Code Execution represents the critical moment when an attacker successfully runs arbitrary code on a target system without physical access.

Affected Products (CPE)CVE.org

cpe:2.3:o:redhat:enterprise_linux:5:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.0:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.1:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.2:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.3:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.4:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.5:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.6:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.7:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.8:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.9:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.10:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.11:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.12:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.13:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.14:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.15:*:*:*:*:*:*:*
cpe:2.3:a:samba:samba:3.5.16:*:*:*:*:*:*:*
+ 76 more

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References

Advisories & patches
ADVISORY https://www.samba.org/samba/security/CVE-2015-0240 REF http://advisories.mageia.org/MGASA-2015-0084.html REF http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00028.html REF http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00030.html REF http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00031.html REF http://lists.opensuse.org/opensuse-security-announce/2015-02/msg00035.html REF http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00042.html REF http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00047.html REF http://lists.opensuse.org/opensuse-security-announce/2016-04/msg00048.html REF http://marc.info/?l=bugtraq&m=142722696102151&w=2 REF http://marc.info/?l=bugtraq&m=143039217203031&w=2 REF http://rhn.redhat.com/errata/RHSA-2015-0249.html REF http://rhn.redhat.com/errata/RHSA-2015-0250.html REF http://rhn.redhat.com/errata/RHSA-2015-0251.html REF http://rhn.redhat.com/errata/RHSA-2015-0252.html REF http://rhn.redhat.com/errata/RHSA-2015-0253.html REF http://rhn.redhat.com/errata/RHSA-2015-0254.html REF http://rhn.redhat.com/errata/RHSA-2015-0255.html REF http://rhn.redhat.com/errata/RHSA-2015-0256.html REF http://rhn.redhat.com/errata/RHSA-2015-0257.html REF http://security.gentoo.org/glsa/glsa-201502-15.xml REF http://www.debian.org/security/2015/dsa-3171 REF http://www.mandriva.com/security/advisories?name=MDVSA-2015:081 REF http://www.mandriva.com/security/advisories?name=MDVSA-2015:082 REF http://www.oracle.com/technetwork/topics/security/bulletinjan2015-2370101.html REF http://www.securityfocus.com/bid/72711 REF http://www.securitytracker.com/id/1031783 REF http://www.slackware.com/security/viewer.php?l=slackware-security&y=2015&m=slackware-security.360345 REF http://www.ubuntu.com/usn/USN-2508-1 REF https://access.redhat.com/articles/1346913 REF https://bugzilla.redhat.com/show_bug.cgi?id=1191325 REF https://security.netapp.com/advisory/ntap-20250509-0001/ REF https://support.lenovo.com/product_security/samba_remote_vuln REF https://support.lenovo.com/us/en/product_security/samba_remote_vuln

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