CVE-2019-1084 Information disclosure in Mail and Calendar
An authenticated attacker can hide entities in conversations by using non-printable characters in display names, leading to information disclosure.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2019-1084?
CVE-2019-1084 is a medium-severity vulnerability in Microsoft Exchange Server, published on 15 Jul 2019. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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'.
Weakness: CWE-200
Which versions are affected by CVE-2019-1084?
It affects 9 products.
Products include Microsoft Exchange Server, Microsoft Lync, Microsoft Lync Basic, Microsoft Mail and Calendar, Microsoft Office, Microsoft Office 365 Proplus and 3 more.
How do I fix CVE-2019-1084?
No fix has been published for CVE-2019-1084 yet. Limit exposure of the affected software until one is available.
Is CVE-2019-1084 being exploited?
There is no known exploitation of CVE-2019-1084 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Exchange Server
- CVE-2024-21410 Microsoft Exchange Server Privilege Escalation
- CVE-2021-34473 Microsoft Exchange Server Remote Code Execution
- CVE-2021-26855 Microsoft Exchange Server Remote Code Execution
- CVE-2021-34523 Microsoft Exchange Server Privilege Escalation
- CVE-2023-21529 Microsoft Exchange Server Deserialization of Untrusted Data
Sources
Also known as GHSA-r2c7-qvrq-pwg6.