Microsoft Lync Server 2010/2013 input validation

Summaryinfo

A vulnerability identified as problematic has been detected in Microsoft Lync Server 2010/2013. This issue affects some unknown processing. This manipulation causes input validation. This vulnerability is tracked as CVE-2019-1029. The attack is possible to be carried out remotely. No exploit exists. It is recommended to apply a patch to fix this issue.

Detailsinfo

A vulnerability has been found in Microsoft Lync Server 2010/2013 (Unified Communication Software) and classified as problematic. Affected by this vulnerability is some unknown functionality. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect availability. The summary by CVE is:

A denial of service vulnerability exists in Skype for Business, aka 'Skype for Business and Lync Server Denial of Service Vulnerability'.

The weakness was disclosed 06/11/2019 as confirmed security update guide (Website). It is possible to read the advisory at portal.msrc.microsoft.com. The public release has been coordinated in cooperation with Microsoft. This vulnerability is known as CVE-2019-1029 since 11/26/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The advisory points out:

A denial of service vulnerability exists in Skype for Business. An attacker who successfully exploited the vulnerability could cause Skype for Business to stop responding. Note that the denial of service would not allow an attacker to execute code or to elevate the attacker's user rights.

The commercial vulnerability scanner Qualys is able to test this issue with plugin 110335 (Microsoft Office and Microsoft Office Services and Web Apps Security Update June 2019).

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

The entries VDB-136328, VDB-136329, VDB-136330 and VDB-136331 are pretty similar. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Unified Communication Software

Vendor

• Microsoft

Name

• Lync Server

Version

• 2010
• 2013

License

• commercial

Website

• Vendor: https://www.microsoft.com/

CPE 2.3info

• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

Discussion