Microsoft Lync 2013 null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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4.6$0-$5k0.00

Summaryinfo

A vulnerability labeled as problematic has been found in Microsoft Lync 2013. Affected by this vulnerability is an unknown functionality. The manipulation results in null pointer dereference. This vulnerability was named CVE-2014-4071. There is no available exploit. It is best practice to apply a patch to resolve this issue.

Detailsinfo

A vulnerability classified as problematic has been found in Microsoft Lync 2013 (Unified Communication Software). Affected is an unknown part. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. CVE summarizes:

The Server in Microsoft Lync Server 2013 allows remote attackers to cause a denial of service (NULL pointer dereference and daemon hang) via a crafted request, aka "Lync Denial of Service Vulnerability."

The weakness was presented 09/09/2014 with Microsoft as MS14-055 as confirmed bulletin (Technet). The advisory is available at technet.microsoft.com. This vulnerability is traded as CVE-2014-4071 since 06/12/2014. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 77575 (MS14-055: Vulnerability in Microsoft Lync Server Could Allow Denial of Service (2990928)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90976 (Microsoft Lync Server Denial of Service Vulnerability (MS14-055)).

Applying the patch MS14-055 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (95547), Tenable (77575), SecurityFocus (BID 69592†), SecurityTracker (ID 1030821†) and Vulnerability Center (SBV-46035†). See VDB-67514, VDB-67516 and VDB-67517 for similar entries. 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: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base 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: 🔍
Status: Unproven

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 77575
Nessus Name: MS14-055: Vulnerability in Microsoft Lync Server Could Allow Denial of Service (2990928)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

OpenVAS ID: 802074
OpenVAS Name: get_kb_item(MS/Lync/Server/Name
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: MS14-055

Timelineinfo

06/12/2014 🔍
09/09/2014 +89 days 🔍
09/09/2014 +0 days 🔍
09/09/2014 +0 days 🔍
09/09/2014 +0 days 🔍
09/09/2014 +0 days 🔍
09/09/2014 +0 days 🔍
09/10/2014 +1 days 🔍
09/10/2014 +0 days 🔍
02/15/2022 +2715 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: MS14-055
Organization: Microsoft
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2014-4071 (🔍)
GCVE (CVE): GCVE-0-2014-4071
GCVE (VulDB): GCVE-100-67518

OVAL: 🔍
IAVM: 🔍

X-Force: 95547 - Microsoft Lync Server defererence denial of service, High Risk
SecurityFocus: 69592 - Microsoft Lync Server CVE-2014-4071 Remote Denial of Service Vulnerability
SecurityTracker: 1030821 - Microsoft Lync Bugs Permit Cross-Site Scripting and Denial of Service Attacks
Vulnerability Center: 46035 - [MS14-055] Microsoft Lync Server 2010 and 2013 Remote DoS via a Crafted Request - CVE-2014-4071, Medium

See also: 🔍

Entryinfo

Created: 09/10/2014 11:36
Updated: 02/15/2022 20:46
Changes: 09/10/2014 11:36 (81), 06/06/2017 08:19 (7), 02/15/2022 20:46 (3)
Complete: 🔍
Cache ID: 216:EDC:103

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