CVE-2021-20517 Path traversal in WebSphere Application Server ND
Remote authenticated attackers can traverse directories to read and delete arbitrary files on IBM WebSphere Application Server.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-20517?
CVE-2021-20517 is a medium-severity path traversal vulnerability in IBM WebSphere Application Server ND, published on 7 Jun 2021. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
IBM WebSphere Application Server Network Deployment 8.5 and 9.0 could allow a remote authenticated attacker to traverse directories. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to read and delete arbitrary files on the system. IBM X-Force ID: 198435.
Weakness: CWE-22
Which versions are affected by CVE-2021-20517?
It affects 1 product.
Products include Ibm Websphere Application Server Nd.
How do I fix CVE-2021-20517?
No fix has been published for CVE-2021-20517 yet. Limit exposure of the affected software until one is available.
Upgrade, and resolve every user-supplied path against an allowed base folder before opening it. More about Path traversal.
Is CVE-2021-20517 being exploited?
There is no known exploitation of CVE-2021-20517 in the wild and no public exploit code.
Sources
Also known as GHSA-fppj-frvc-63q2.