Samba up to 4.5.14/4.6.10/4.7.2 memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Samba up to 4.5.14/4.6.10/4.7.2. The impacted element is an unknown function. The manipulation leads to memory corruption. This vulnerability is uniquely identified as CVE-2017-15275. The attack is possible to be carried out remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Samba up to 4.5.14/4.6.10/4.7.2 (File Transfer Software) and classified as problematic. This issue affects some unknown processing. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality. The summary by CVE is:

Samba before 4.7.3 might allow remote attackers to obtain sensitive information by leveraging failure of the server to clear allocated heap memory.

The bug was discovered 11/21/2017. The weakness was disclosed 11/21/2017 by Volker Lendecke (ERNE) with The Samba Team as CVE-2017-15275.html as confirmed advisory (Website). It is possible to read the advisory at samba.org. The public release has been coordinated in cooperation with the project team. The identification of this vulnerability is CVE-2017-15275 since 10/11/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The advisory points out:

All versions of Samba from 3.6.0 onwards are vulnerable to a heap memory information leak, where server allocated heap memory may be returned to the client without being cleared. There is no known vulnerability associated with this error, but uncleared heap memory may contain previously used data that may help an attacker compromise the server via other methods. Uncleared heap memory may potentially contain password hashes or other high-value data.

The vulnerability scanner Nessus provides a plugin with the ID 104843 (RHEL 6 : samba4 (RHSA-2017:3278)), 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 196977 (Ubuntu Security Notification for Samba Vulnerabilities (USN-3486-1)).

Upgrading to version 4.7.3, 4.6.11 or 4.5.15 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (104843), SecurityFocus (BID 101908†) and SecurityTracker (ID 1039855†). The entry VDB-109786 is pretty similar. Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Type

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 104843
Nessus Name: RHEL 6 : samba4 (RHSA-2017:3278)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 68989
OpenVAS Name: Debian Security Advisory DSA 4043-1 (samba - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: Samba 4.7.3/4.6.11/4.5.15

Timelineinfo

10/11/2017 🔍
11/21/2017 +41 days 🔍
11/21/2017 +0 days 🔍
11/21/2017 +0 days 🔍
11/21/2017 +0 days 🔍
11/21/2017 +0 days 🔍
11/22/2017 +1 days 🔍
11/27/2017 +5 days 🔍
11/29/2017 +2 days 🔍
12/09/2019 +740 days 🔍

Sourcesinfo

Product: samba.org

Advisory: CVE-2017-15275.html
Researcher: Volker Lendecke (ERNE)
Organization: The Samba Team
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2017-15275 (🔍)
GCVE (CVE): GCVE-0-2017-15275
GCVE (VulDB): GCVE-100-109787

OVAL: 🔍

SecurityFocus: 101908 - Samba CVE-2017-15275 Information Disclosure Vulnerability
SecurityTracker: 1039855

See also: 🔍

Entryinfo

Created: 11/22/2017 09:34
Updated: 12/09/2019 11:55
Changes: 11/22/2017 09:34 (83), 12/09/2019 11:55 (7)
Complete: 🔍
Cache ID: 216::103

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