Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allowing a malicious cli
Samba since version 3.5.0 and before 4.6.4, 4.5.10 and 4.4.14 is vulnerable to remote code execution vulnerability, allowing a malicious client to upload a shared library to a writable share, and then cause the server to load and execute it.
- Published
- May 30, 2017
- Updated
- Jun 16, 2026
- EPSS
- 99.4% · 100th percentile
- CWE
- CWE-94
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Report tools
Action score
99
Now
Patch today or shut off access.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 30 / 30 · Listed
- EPSS
- 30 / 30 · 99.4%
CISA SSVC decision
- Exploitation
- active
- Automatable
- yes
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
Actively exploited in the wild
CISA added this to its Known Exploited Vulnerabilities catalog on Mar 30, 2023. That signals real attacks, not theory.
Remediation deadline for government agencies: Apr 20, 2023.
Known to be used in ransomware campaigns.
Affected systems
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux8.0
- samba samba3.5.0 and later · before 4.4.0
- samba samba4.4.0 and later · before 4.4.14
- samba samba4.5.0 and later · before 4.5.10
- samba samba4.6.0 and later · before 4.6.4
Versions reported by the vendor
Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.
Samba samba
- since 3.5.0affected
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Alpine:v3.3 | samba | from 3.5.0 · before 4.2.14-r3 | 4.2.14-r3 |
| Alpine:v3.4 | samba | from 3.5.0 · before 4.4.14-r0 | 4.4.14-r0 |
| Debian:12 | samba | before 2:4.5.8+dfsg-2 | 2:4.5.8+dfsg-2 |
| Debian:7 | samba | before 2:3.6.6-6+deb7u13 | 2:3.6.6-6+deb7u13 |
| Debian:8 | samba | before 2:4.2.14+dfsg-0+deb8u6 | 2:4.2.14+dfsg-0+deb8u6 |
| Red Hat:enterprise_linux:6::client | libsmbclient | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | libsmbclient-devel | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-client | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-common | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-debuginfo | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-doc | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-domainjoin-gui | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-glusterfs | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-swat | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-winbind | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-winbind-clients | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-winbind-devel | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba-winbind-krb5-locator | before 0:3.6.23-43.el6_9 | 0:3.6.23-43.el6_9 |
| Red Hat:enterprise_linux:6::client | samba4 | before 0:4.2.10-10.el6_9 | 0:4.2.10-10.el6_9 |
| Red Hat:enterprise_linux:6::client | samba4-client | before 0:4.2.10-10.el6_9 | 0:4.2.10-10.el6_9 |
| Red Hat:enterprise_linux:6::client | samba4-common | before 0:4.2.10-10.el6_9 | 0:4.2.10-10.el6_9 |
| Red Hat:enterprise_linux:6::client | samba4-dc | before 0:4.2.10-10.el6_9 | 0:4.2.10-10.el6_9 |
| Red Hat:enterprise_linux:6::client | samba4-dc-libs | before 0:4.2.10-10.el6_9 | 0:4.2.10-10.el6_9 |
+96
Same product
samba: all recordsOther highest-scoring records for the same primary product.
- CVE-2015-0240The 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 befor66This week
- CVE-2003-0085Buffer overflow in the SMB/CIFS packet fragment re-assembly code for SMB daemon (smbd) in Samba before 2.2.8, and Samba-TNG before 0.3.1, al66This week
- CVE-2003-0201Buffer overflow in the call_trans2open function in trans2.c for Samba 2.2.x before 2.2.8a, 2.0.10 and earlier 2.0.x versions, and Samba-TNG 65This week
- CVE-2007-2446Multiple heap-based buffer overflows in the NDR parsing in smbd in Samba 3.0.0 through 3.0.25rc3 allow remote attackers to execute arbitrary63This week
- CVE-2012-1182The RPC code generator in Samba 3.x before 3.4.16, 3.5.x before 3.5.14, and 3.6.x before 3.6.4 does not implement validation of an array len62This week
- CVE-2021-44142The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide "...enhanced compatibility with Apple SMB clients and intero57Plan
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| alpine:samba | 4.2.14-r3 · Alpine:v3.3 | Package registry (OSV) |
| debian:samba | 2:4.5.8+dfsg-2 · Debian:12 | Package registry (OSV) |
| red hat:libsmbclient | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:libsmbclient-devel | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba-client | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba-common | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba-debuginfo | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba-doc | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba-domainjoin-gui | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba-glusterfs | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba-swat | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba-winbind | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| red hat:samba-winbind-clients | 0:3.6.23-43.el6_9 · Red Hat:enterprise_linux:6::client | Package registry (OSV) |
| suse:samba | 3.6.3-93.1 · SUSE:Linux Enterprise Software Development Kit 11 SP4 | Package registry (OSV) |
| suse:samba-doc | 3.6.3-93.1 · SUSE:Linux Enterprise Point of Sale 11 SP3 | Package registry (OSV) |
Exploit status
Weaponized
A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.
Evidence
- Metasploit module ×1
- Exploit-DB entry ×2
- Proof-of-concept repository on GitHub ×21
Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.
| Source | Kind | Date |
|---|---|---|
| Exploit-DB entry | remote | 2017-05-24 |
| Exploit-DB entry | remote | 2017-05-29 |
| Metasploit module | exploit/linux/samba/is_known_pipenameSamba is_known_pipename() Arbitrary Module Loadexploit | 2017-03-24 |
| Proof-of-concept repository on GitHub | stars:181 | 2017-05-25 |
| Proof-of-concept repository on GitHub | stars:0 | 2017-05-25 |
| Proof-of-concept repository on GitHub | stars:380 | 2017-05-26 |
| Proof-of-concept repository on GitHub | stars:63 | 2017-05-26 |
| Proof-of-concept repository on GitHub | stars:58 | 2017-05-30 |
| Proof-of-concept repository on GitHub | stars:259 | 2017-06-05 |
| Proof-of-concept repository on GitHub | stars:1 | 2017-07-28 |
| Proof-of-concept repository on GitHub | stars:0 | 2018-05-10 |
| Proof-of-concept repository on GitHub | stars:0 | 2019-01-06 |
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
- Metasploit-68 d
- First PoC-7 d
- Published
- CISA KEV+2129 d
- TodaySep 30, 2026+3410 d
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-94 · Improper Control of Generation of Code ('Code Injection')CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Attack patterns (CAPEC)
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- www.debian.org/security/2017/dsa-3860
- www.securityfocus.com/bid/98636
- www.securitytracker.com/id/1038552
- access.redhat.com/errata/RHSA-2017:1270
- access.redhat.com/errata/RHSA-2017:1271
- access.redhat.com/errata/RHSA-2017:1272
- access.redhat.com/errata/RHSA-2017:1273
- access.redhat.com/errata/RHSA-2017:1390
- download.schneider-electric.com/files?p_enDocType=Technical+leaflet&p_File_Name=SEVD-2018-095-01+Security+Notification+Umotion+V1.1.pdf&p_Doc_Ref=SEVD-2018-095-01
- h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbns03755en_us
- h20566.www2.hpe.com/hpsc/doc/public/display?docLocale=en_US&docId=emr_na-hpesbux03759en_us
- security.gentoo.org/glsa/201805-07
- security.netapp.com/advisory/ntap-20170524-0001/
- www.exploit-db.com/exploits/42060/
- www.exploit-db.com/exploits/42084/
- www.samba.org/samba/security/CVE-2017-7494.html
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-7494
Vendor advisories and official records. Exploit/PoC links are deliberately left out.