CVE-2016-3976 SAP NetWeaver Directory Traversal

What is CVE-2016-3976?

CVE-2016-3976 is a high-severity path traversal vulnerability in Sap Netweaver Application Server Java, published on 7 Apr 2016. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

Directory traversal vulnerability in SAP NetWeaver AS Java 7.1 through 7.5 allows remote attackers to read arbitrary files via a ..\ (dot dot backslash) in the fileName parameter to CrashFileDownloadServlet, aka SAP Security Note 2234971.

Weakness: CWE-22

Which versions are affected by CVE-2016-3976?

It affects 1 product.

Products include Sap Netweaver Application Server Java.

How do I fix CVE-2016-3976?

No fix has been published for CVE-2016-3976 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 May 2022.

Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.

Is CVE-2016-3976 being exploited?

Yes. Attackers have exploited CVE-2016-3976 in the wild since at least 3 Nov 2021.

Public exploit code: 1 Exploit-DB entry.

Other vulnerabilities in Sap Netweaver Application Server Java

• CVE-2020-6287 SAP NetWeaver Missing Authentication for Critical Function Exploited Critical 10.0
• CVE-2010-5326 SAP NetWeaver Remote Code Execution Exploited Critical 10.0
• CVE-2016-2386 SAP NetWeaver SQL Injection Exploited Critical 9.8
• CVE-2017-12637 SAP NetWeaver Directory Traversal Exploited High 7.5
• CVE-2016-9563 SAP NetWeaver XML External Entity (XXE) Exploited Medium 6.5

All Sap Netweaver Application Server Java vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-jvxp-2488-w24g.