CVE-2021-38163 SAP NetWeaver: file path flaw
In plain words: The program can be tricked into reading or writing files outside the folder it should stay in. Leaks files such as passwords and settings, or overwrites important ones.
Confirmed exploited by CISA on · US federal patch deadline Jun 30, 2022
What to do
- Install SAP's security update for NetWeaver. If no update exists, follow the vendor's workaround or stop using the product until one ships.
- Keep a list of every internet-facing server you run so nothing is forgotten.
- Patch anything in this catalog first, ahead of normal patch cycles.
- Put admin and file-transfer apps behind a VPN or single sign-on instead of the open internet.
Who is affected
Work IT. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.
What's at risk: Mass data theft and ransomware: a single flaw in a file-transfer or email server has exposed thousands of organisations at once.
The details
- Official name
- SAP NetWeaver Unrestricted File Upload Vulnerability
- Product
- SAP NetWeaver
- CISA description
- SAP NetWeaver contains a vulnerability that allows unrestricted file upload.
- Type of flaw
- File path flaw (CWE-23)
- Confirmed exploited
- Jun 9, 2022
- US federal patch deadline
- Jun 30, 2022
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Answering about CVE-2021-38163 ·
Questions about CVE-2021-38163
Is CVE-2021-38163 being exploited?
Yes. CISA added CVE-2021-38163 to its Known Exploited Vulnerabilities catalog on Jun 9, 2022, which means there is reliable evidence of real-world attacks.
How do I fix CVE-2021-38163?
Install SAP's security update for NetWeaver. If no update exists, follow the vendor's workaround or stop using the product until one ships. Keep a list of every internet-facing server you run so nothing is forgotten.
Am I affected by CVE-2021-38163?
Only if you use SAP NetWeaver. Aimed mostly at company systems — you are affected through the companies you use, not your own phone.