Privilege escalation in Microsoft Windows Background Intelligent Transfer Service



Risk Medium
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2020-1255
CWE-ID CWE-264
Exploitation vector Network
Public exploit N/A
Vulnerable software
Windows
Operating systems & Components / Operating system

Windows Server
Operating systems & Components / Operating system

Vendor Microsoft

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Permissions, Privileges, and Access Controls

EUVDB-ID: #VU28889

Risk: Medium

CVSSv4.0: 5.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-1255

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to the way Windows Background Intelligent Transfer Service (BITS) IIS module handles uploaded content. A remote authenticated attacker can upload restricted file types to an IIS-hosted folder

To exploit this vulnerability, an attacker would require permissions to upload files via BITS.

Mitigation

Install update from vendor's website.

Vulnerable software versions

Windows: 7 - 10 2004 10.0.19041.264

Windows Server: 2008 - 2019 2004

CPE2.3 External links

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1255


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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