ADV190014 — Microsoft Live Accounts Elevation of Privilege Vulnerability

Executive Summary

An elevation of privilege vulnerability exists in Outlook Web Access (OWA) regarding a possible unsigned token. An attacker who successfully exploited this vulnerability could have access to another person's email inbox. To exploit this vulnerability, an attacker would first have to replace an unsigned token with a different one. This vulnerability has been mitigated for all users' Microsoft Live accounts.

Overview

Important

MS Severity

Not Exploited

MS Exploit Status

Not Found

MS Exploit Likelihood

Category Elevation of Privilege

Released Aug 13 2019

Last Updated Aug 13 2019

Publicly Disclosed No

CISA KEV Not Listed

Known Exploits None Known

EPSS Score

No EPSS score available for this CVE.

View on FIRST.org

Affected Products

3 affected products

Product	KB Article	Severity	Impact	Restart Required
Microsoft Exchange Online	`—`	Important	Elevation of Privilege	Unknown
Microsoft Office 365	`—`	Important	Elevation of Privilege	Unknown
Outlook.com	`—`	Important	Elevation of Privilege	Unknown

Patches

1 patch

Article	Type	Restart
`—`		Unknown

Known Exploits

No known exploits have been linked for this CVE yet. When available, exploit references will be sourced from public repositories and may be unverified, incomplete, or non-functional. Always review code carefully before use in any environment.

Acknowledgments

Terry Zhang of Tophant, Ron Chan

References

MSRC Advisory MITRE NVD