CVE-2019-1084

Description

An information disclosure vulnerability exists when Exchange allows creation of entities with Display Names having non-printable characters. An authenticated attacker could exploit this vulnerability by creating entities with invalid display names, which, when added to conversations, remain invisible. This security update addresses the issue by validating display names upon creation in Microsoft Exchange, and by rendering invalid display names correctly in Microsoft Outlook clients., aka 'Microsoft Exchange Information Disclosure Vulnerability'.

Category

6.5
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 7.96% Top 10%
Vendor Advisory microsoft.com
Affected: Microsoft Microsoft Exchange Server
Affected: Microsoft Microsoft Outlook
Affected: Microsoft Microsoft Office
Affected: Microsoft Microsoft Lync
Affected: Microsoft Microsoft Lync Basic
Affected: Microsoft Microsoft Outlook for Android
Affected: Microsoft Skype for Business
Affected: Microsoft Skype for Business Basic
Affected: Microsoft Office 365 ProPlus
Affected: Microsoft Microsoft Exchange Server 2016
Affected: Microsoft Microsoft Exchange Server 2019
Affected: Microsoft Microsoft Exchange Server 2013
Affected: Microsoft Mail and Calendar
Affected: Microsoft Outlook for iOS
Published at:
Updated at:

References

Link Tags
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2019-1084 patch vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-1084?
CVE-2019-1084 has been scored as a medium severity vulnerability.
How to fix CVE-2019-1084?
To fix CVE-2019-1084, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-1084 being actively exploited in the wild?
It is possible that CVE-2019-1084 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~8% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2019-1084?
CVE-2019-1084 affects Microsoft Microsoft Exchange Server, Microsoft Microsoft Outlook, Microsoft Microsoft Office, Microsoft Microsoft Lync, Microsoft Microsoft Lync Basic, Microsoft Microsoft Outlook for Android, Microsoft Skype for Business, Microsoft Skype for Business Basic, Microsoft Office 365 ProPlus, Microsoft Microsoft Exchange Server 2016, Microsoft Microsoft Exchange Server 2019, Microsoft Microsoft Exchange Server 2013, Microsoft Mail and Calendar, Microsoft Outlook for iOS.
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