Advisory Details

October 19th, 2020

Microsoft Outlook HTML Email Out-Of-Bounds Read Information Disclosure Vulnerability

ZDI-20-1250
ZDI-CAN-11250

CVE ID CVE-2020-16947
CVSS SCORE 3.7, (AV:N/AC:H/PR:N/UI:N/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 open a malicious email or view it in the preview pane.

The specific flaw exists within the parsing of HTML content in email. A crafted email can trigger a read before the start 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://portal.msrc.microsoft.com/en-us/security-guidance/advisory/CVE-2020-16947
DISCLOSURE TIMELINE
  • 2020-07-01 - Vulnerability reported to vendor
  • 2020-10-19 - Coordinated public release of advisory
CREDIT 0neb1n
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