1) Buffer overflow

Severity: Critical

CVSSv3: 8.8 [CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:H/RL:U/RC:C] [PCI]

CVE-ID: N/A

CWE-ID: CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer

Exploit availability: No

Description

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to a boundary error within the Windows Adobe Type Manager Library when parsing a specially-crafted multi-master font - Adobe Type 1 PostScript format. A remote attacker can create a specially crafted document, trick the victim into opening it, trigger memory corruption and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Note, this vulnerability is being actively exploited in the wild.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Windows: 7, 8.1, 10, 10 1607, 10 1709, 10 1803, 10 1809, 10 1903, 10 1909, RT 8.1

Windows Server: 1803, 1903, 1909, 2008, 2008 R2, 2012, 2012 R2, 2016, 2019

CPE

• cpe:/a:microsoft:windows:10 1803:
• cpe:/a:microsoft:windows:10 1809:
• cpe:/a:microsoft:windows:10 1909:
• cpe:/a:microsoft:windows:10 1709:
• cpe:/a:microsoft:windows:10 1903:
• cpe:/a:microsoft:windows:10:
• cpe:/a:microsoft:windows:10 1607:
• cpe:/a:microsoft:windows:7:
• cpe:/a:microsoft:windows:8.1:
• cpe:/a:microsoft:windows:RT 8.1:
• cpe:/a:microsoft:windows_server:1803:
• cpe:/a:microsoft:windows_server:2019:
• cpe:/a:microsoft:windows_server:1909:
• cpe:/a:microsoft:windows_server:1903:
• cpe:/a:microsoft:windows_server:2016:
• cpe:/a:microsoft:windows_server:2008:
• cpe:/a:microsoft:windows_server:2008 R2:
• cpe:/a:microsoft:windows_server:2012:
• cpe:/a:microsoft:windows_server:2012 R2:

External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200006

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

Yes. This vulnerability is being exploited in the wild.