VDB-129845 · CVE-2019-0624 · BID 106663

Microsoft Skype for Business 2015 CU 8 Request input validation

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.3$0-$5k0.00

A vulnerability, which was classified as critical, has been found in Microsoft Skype for Business 2015 CU 8 (Unified Communication Software). This issue affects some unknown functionality. The manipulation as part of a Request leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability.

The bug was discovered 01/15/2019. The weakness was published 01/15/2019 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. The public release has been coordinated with Microsoft. The identification of this vulnerability is CVE-2019-0624 since 11/26/2018. The attack may be initiated remotely. A simple authentication is required for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 05/02/2020). The advisory points out:

A spoofing vulnerability exists when a Skype for Business 2015 server does not properly sanitize a specially crafted request. An authenticated attacker could exploit the vulnerability by sending a specially crafted request to an affected Skype for Business server. The attacker who successfully exploited this vulnerability could then perform cross-site scripting attacks on affected systems and run script in the security context of the current user.

The vulnerability scanner Nessus provides a plugin with the ID 121213 (Security Updates for Microsoft Skype for Business and Microsoft Lync (January 2019 OOB)), 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 local. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371640 (Microsoft Skype for Business 2015 Spoofing Vulnerability).

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 vulnerability database at Tenable (121213).

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv3info

VulDB Meta Base Score: 5.5
VulDB Meta Temp Score: 5.3

VulDB Base Score: 5.5
VulDB Temp Score: 5.3
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.4
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: Privilege escalation
CWE: CWE-20
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 121213
Nessus Name: Security Updates for Microsoft Skype for Business and Microsoft Lync (January 2019 OOB)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: portal.msrc.microsoft.com

Timelineinfo

11/26/2018 🔍
01/15/2019 +50 days 🔍
01/15/2019 +0 days 🔍
01/15/2019 +0 days 🔍
01/15/2019 +0 days 🔍
01/16/2019 +1 days 🔍
01/17/2019 +1 days 🔍
01/18/2019 +1 days 🔍
05/02/2020 +470 days 🔍

Sourcesinfo

Vendor: microsoft.com

Advisory: portal.msrc.microsoft.com
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2019-0624 (🔍)
SecurityFocus: 106663 - Microsoft Skype for Business Server CVE-2019-0624 Spoofing Vulnerability

scip Labs: https://www.scip.ch/en/?labs.20140918

Entryinfo

Created: 01/18/2019 07:57 AM
Updated: 05/02/2020 11:01 AM
Changes: (4) vulnerability_discoverydate advisory_confirm_url source_securityfocus_date source_securityfocus_class
Complete: 🔍

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