CVE-2016-3976: SAP NetWeaver Directory Traversal Vulnerability

CVE-2016-3976 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2021-11-03

SAP NetWeaver Application Server Java contains a directory traversal vulnerability in the CrashFileDownloadServlet. Remote attackers can exploit this by using dot-dot-backslash (..\\) sequences in the fileName parameter to read arbitrary files from the server.

Technologies: SAP NetWeaver. Vendors: SAP.

Quick answers

Is CVE-2016-3976 exploited in the wild?
Yes. CVE-2016-3976 is known to be exploited in the wild, first recorded on 3 November 2021. Treat it as urgent.
How severe is CVE-2016-3976?
Critical severity, with a CVSS score of 7.5, published 3 November 2021.
Which products and versions are affected?
SAP NetWeaver AS Java 7.1 through 7.5.
Is there a fix for CVE-2016-3976?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2016-3976 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2016-3976?
Check whether you run SAP NetWeaver. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Affected products

  • SAP NetWeaver AS Java 7.1 through 7.5

Timeline

  • 2016-03-08: advisory: SAP Security Note 2234971 released
  • 2021-11-03: kev added: Added to CISA Known Exploited Vulnerabilities Catalog
  • 2021-11-03: disclosed: NVD publication date

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.