Advisory Details

December 11th, 2020

Microsoft Outlook MSG File Parsing Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-20-1422
ZDI-CAN-11887

CVE ID CVE-2020-17119
CVSS SCORE 2.5, AV:L/AC:H/PR:N/UI:R/S:U/C:L/I:N/A:N
AFFECTED VENDORS Microsoft
AFFECTED PRODUCTS Outlook
VULNERABILITY DETAILS

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Microsoft Outlook. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the parsing of MSG files. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of the current process.

ADDITIONAL DETAILS Microsoft has issued an update to correct this vulnerability. More details can be found at:
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-17119
DISCLOSURE TIMELINE
  • 2020-09-18 - Vulnerability reported to vendor
  • 2020-12-11 - Coordinated public release of advisory
CREDIT kdot
BACK TO ADVISORIES