Microsoft Windows 8.1/RT 8.1/Server 2012 R2 SMBv2/SMBv3 null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.8$0-$5k0.00

Summaryinfo

A vulnerability was found in Microsoft Windows 8.1/RT 8.1/Server 2012 R2 and classified as problematic. This affects an unknown function of the component SMBv2/SMBv3. Such manipulation leads to null pointer dereference. This vulnerability is traded as CVE-2018-0833. The attack may be launched remotely. Furthermore, there is an exploit available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability was found in Microsoft Windows 8.1/RT 8.1/Server 2012 R2 (Operating System). It has been rated as problematic. Affected by this issue is an unknown code of the component SMBv2/SMBv3. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability.

The bug was discovered 02/13/2018. The weakness was shared 02/13/2018 with Zero Day Initiative as confirmed security update guide (Website). The advisory is shared for download at portal.msrc.microsoft.com. This vulnerability is handled as CVE-2018-0833 since 12/01/2017. The exploitation is known to be difficult. The attack may be launched remotely. A simple authentication is needed for exploitation. Successful exploitation requires user interaction by the victim. Technical details are unknown but a public exploit is available. The advisory points out:

A denial of service vulnerability exists in implementations of the Microsoft Server Message Block 2.0 and 3.0 (SMBv2/SMBv3) client. The vulnerability is due to improper handling of certain requests sent by a malicious SMB server to the client. An attacker who successfully exploited this vulnerability could cause the affected system to stop responding until it is manually restarted.

The exploit is available at exploit-db.com. It is declared as proof-of-concept. As 0-day the estimated underground price was around $5k-$25k. The vulnerability scanner Nessus provides a plugin with the ID 106800 (KB4074597: Windows 8.1 and Windows Server 2012 R2 February 2018 Security Update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 91432 (Microsoft Windows Security Update February 2018).

Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Exploit-DB (44189), Tenable (106800) and SecurityFocus (BID 102924†). The entries VDB-113222, VDB-113229, VDB-113230 and VDB-113241 are related to this item. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.0
VulDB Meta Temp Score: 4.8

VulDB Base Score: 4.8
VulDB Temp Score: 4.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

Vendor Base Score (Microsoft): 4.8
Vendor Vector (Microsoft): 🔍

NVD Base Score: 5.3
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

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

EPSS Score: 🔍
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Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 106800
Nessus Name: KB4074597: Windows 8.1 and Windows Server 2012 R2 February 2018 Security Update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 11142
OpenVAS Name: Microsoft Windows Multiple Vulnerabilities (KB4074594)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Patch
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
Suricata ID: 2025983
Suricata Class: 🔍
Suricata Message: 🔍

Timelineinfo

12/01/2017 🔍
02/13/2018 +74 days 🔍
02/13/2018 +0 days 🔍
02/13/2018 +0 days 🔍
02/13/2018 +0 days 🔍
02/13/2018 +0 days 🔍
02/14/2018 +1 days 🔍
02/14/2018 +0 days 🔍
08/17/2024 +2376 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: portal.msrc.microsoft.com
Researcher: Nabeel Ahmed, Eric Schayes
Organization: Zero Day Initiative
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2018-0833 (🔍)
GCVE (CVE): GCVE-0-2018-0833
GCVE (VulDB): GCVE-100-113264

OVAL: 🔍

SecurityFocus: 102924 - Microsoft Windows SMB Server CVE-2018-0833 Denial of Service Vulnerability
SecurityTracker: 1040375

scip Labs: https://www.scip.ch/en/?labs.20140213
See also: 🔍

Entryinfo

Created: 02/14/2018 09:32
Updated: 08/17/2024 22:39
Changes: 02/14/2018 09:32 (85), 01/14/2020 20:54 (12), 02/03/2021 16:07 (3), 02/03/2021 16:12 (1), 08/17/2024 22:39 (17)
Complete: 🔍
Cache ID: 216::103

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