Microsoft Exchange Server 2016 CU12/2016 CU13/2019 CU1/2019 CU2 Outlook Web App input validation
|CVSS Meta Temp Score|
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
|Current Exploit Price (≈)|
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
|CTI Interest Score|
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
A vulnerability was found in Microsoft Exchange Server 2016 CU12/2016 CU13/2019 CU1/2019 CU2 (Groupware Software). It has been declared as problematic. Affected by this vulnerability is an unknown part of the component Outlook Web App. The manipulation with an unknown input leads to a privilege escalation vulnerability. The CWE definition for the vulnerability is CWE-20. As an impact it is known to affect confidentiality. The summary by CVE is:
A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web App (OWA) fails to properly handle web requests, aka 'Microsoft Exchange Spoofing Vulnerability'.
The weakness was presented 09/10/2019 as confirmed security update guide (Website). The advisory is shared at portal.msrc.microsoft.com. The public release was coordinated in cooperation with Microsoft. This vulnerability is known as CVE-2019-1266 since 11/26/2018. The attack can be launched remotely. The exploitation doesn't need any form of authentication. 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 $5k-$25k at the moment (estimation calculated on 08/20/2020). The advisory points out:
A spoofing vulnerability exists in Microsoft Exchange Server when Outlook Web App (OWA) fails to properly handle web requests. An attacker who successfully exploited the vulnerability could perform script or content injection attacks, and attempt to trick the user into disclosing sensitive information. An attacker could also redirect the user to a malicious website that could spoof content or the vulnerability could be used as a pivot to chain an attack with other vulnerabilities in web services.
Applying a patch is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.
CVSSv3VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.1
VulDB Base Score: 4.7
VulDB Temp Score: 4.5
VulDB Vector: 🔍
VulDB Reliability: 🔍
NVD Base Score: 6.1
NVD Vector: 🔍
VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍
NVD Base Score: 🔍
ExploitingClass: Privilege escalation
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔍
Threat IntelligenceThreat: 🔍
Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍
09/10/2019 +288 days 🔍
09/10/2019 +0 days 🔍
09/11/2019 +1 days 🔍
08/20/2020 +344 days 🔍
CVE: CVE-2019-1266 (🔍)
EntryCreated: 09/11/2019 03:25 PM
Updated: 08/20/2020 06:52 AM
Changes: (1) source_cve_assigned
Might our Artificial Intelligence support you?
Check our Alexa App!