Samba up to 4.4.10/4.5.6/4.6.0 race condition

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability identified as critical has been detected in Samba up to 4.4.10/4.5.6/4.6.0. Affected by this vulnerability is an unknown functionality. The manipulation leads to race condition. This vulnerability is traded as CVE-2017-2619. It is possible to initiate the attack remotely. Furthermore, there is an exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in Samba up to 4.4.10/4.5.6/4.6.0 (File Transfer Software). It has been rated as critical. This issue affects some unknown functionality. The manipulation with an unknown input leads to a race condition vulnerability. Using CWE to declare the problem leads to CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Samba before versions 4.6.1, 4.5.7 and 4.4.11 are vulnerable to a malicious client using a symlink race to allow access to areas of the server file system not exported under the share definition.

The bug was discovered 03/23/2017. The weakness was shared 03/12/2018 as Bug 1429472 as not defined bug report (Bugzilla). The advisory is shared at bugzilla.redhat.com. The identification of this vulnerability is CVE-2017-2619 since 12/01/2016. The exploitation is known to be easy. The attack may be initiated remotely. A simple authentication is required for exploitation. Technical details are unknown but a public exploit is available.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 60 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 100346 (RHEL 7 : samba (RHSA-2017:1265)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157509 (Oracle Enterprise Linux Security Update for samba (ELSA-2017-1950)).

Upgrading to version 4.4.11, 4.5.7 or 4.6.1 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (41740), Tenable (100346) and SecurityFocus (BID 97033†). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.0
VulDB Meta Temp Score: 6.7

VulDB Base Score: 6.5
VulDB Temp Score: 5.9
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Race condition
CWE: CWE-362
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept
Download: 🔍

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 100346
Nessus Name: RHEL 7 : samba (RHSA-2017:1265)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 881932
OpenVAS Name: CentOS Update for libsmbclient CESA-2017:2789 centos6
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Samba 4.4.11/4.5.7/4.6.1

Timelineinfo

12/01/2016 🔍
03/23/2017 +112 days 🔍
03/23/2017 +0 days 🔍
05/22/2017 +60 days 🔍
05/23/2017 +1 days 🔍
03/12/2018 +293 days 🔍
03/12/2018 +0 days 🔍
03/13/2018 +1 days 🔍
06/25/2025 +2661 days 🔍

Sourcesinfo

Product: samba.org

Advisory: Bug 1429472
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2017-2619 (🔍)
GCVE (CVE): GCVE-0-2017-2619
GCVE (VulDB): GCVE-100-114389

OVAL: 🔍

SecurityFocus: 97033 - Samba CVE-2017-2619 Symlink Vulnerability
SecurityTracker: 1038117

scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 03/13/2018 07:45
Updated: 06/25/2025 14:02
Changes: 03/13/2018 07:45 (77), 01/12/2020 15:47 (7), 02/21/2023 10:53 (4), 06/25/2025 14:02 (17)
Complete: 🔍
Cache ID: 216::103

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