Privilege escalation via mishandled BITS uploads
Published Jun 9, 2020 · Updated Aug 4, 2024
Elevation of privilege in the BITS IIS module in Microsoft Windows allows remote authenticated users to gain elevated privileges via uploaded content. Microsoft has disclosed only that the module improperly handles uploaded content, not the specific malformed input, function, or incorrect code operation. Access requires low privileges and a reachable IIS deployment with the BITS upload extension enabled; successful exploitation grants elevated Windows privileges.
Summary
What happened
Elevation of privilege in the BITS IIS module in Microsoft Windows allows remote authenticated users to gain elevated privileges via uploaded content. Microsoft has disclosed only that the module improperly handles uploaded content, not the specific malformed input, function, or incorrect code operation. Access requires low privileges and a reachable IIS deployment with the BITS upload extension enabled; successful exploitation grants elevated Windows privileges.
The record
- CVE
- CVE-2020-1255
- Published
- Jun 9, 2020
- Updated
- Aug 4, 2024
- Vendor
- Microsoft
- Product
- Windows 10 Version 1909
- Classifications
- T1068
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 9, 2020CVE publishedPublication date reported by the CVE source.
- Aug 4, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo