CVE-2020-0787highunder attackransomwareCWE-59

CVE-2020-0787: high-severity vulnerability in Microsoft Windows

Published · Updated

100Vexday Risk Score

Patch now. It under exploitation confirmed by CISA and has a working public exploit.

ssvc Actcvss 7.8epss 43%
from disclosure to weapon96 days
Published on NVDMar 12
1st PoC+96d
metasploitMar 10
CISA KEV+687d
exploitation probability
43%top 1% of all CVEs
observed exploitation
yesCISA + VulnCheck
14 public exploit(s)
Action required by CISAfederal deadline: 2022-07-28

Apply updates per vendor instructions.

In short

Windows BITS service fails to properly handle symbolic links, allowing an attacker with local access to escalate their privileges to system level. This is dangerous because it lets a regular user gain administrative control of the computer.

Technical detail

A local privilege escalation vulnerability in Windows BITS stems from improper symbolic link validation. An authenticated local attacker can exploit this by creating malicious symbolic links that BITS processes with elevated privileges, leading to arbitrary code execution in the SYSTEM context.

Summary generated and translated by AI from the official description.

The full analysis of this CVE is available in Portuguese →

An elevation of privilege vulnerability exists when the Windows Background Intelligent Transfer Service (BITS) improperly handles symbolic links, aka 'Windows Background Intelligent Transfer Service Elevation of Privilege Vulnerability'.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
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