What is CVE-2021-20517?

CVE-2021-20517 is a vulnerability in IBM WebSphere Application Server Network Deployment 8.5 and 9.0 that allows a remote authenticated attacker to traverse directories and read/delete arbitrary files on the system.

What is the severity of CVE-2021-20517?

CVE-2021-20517 has a severity rating of 8.8, which is considered high.

How does CVE-2021-20517 impact IBM WebSphere Application Server ND?

CVE-2021-20517 allows a remote authenticated attacker to traverse directories and potentially read/delete arbitrary files on IBM WebSphere Application Server ND 8.5 and 9.0.

What is the IBM X-Force ID for CVE-2021-20517?

The IBM X-Force ID for CVE-2021-20517 is 198435.

How can I fix the CVE-2021-20517 vulnerability?

To fix the CVE-2021-20517 vulnerability, it is recommended to apply the necessary patches provided by IBM and ensure the affected versions of IBM WebSphere Application Server ND are updated to the latest version.

Vulnerability/
CVE-2021-20517

high

8.8

CWE

27/5/2021

3/8/2024

CVE-2021-20517: Path Traversal

First published: Thu May 27 2021(Updated: )

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.

Credit: psirt@us.ibm.com

Affected Software	Affected Version	How to fix
IBM WebSphere Application Server ND	<=9.0
IBM WebSphere Application Server ND	<=8.5
IBM WebSphere Application Server ND	>=8.5.0.0<8.5.5.20
IBM WebSphere Application Server ND	>=9.0.0.0<9.0.5.8

Remedy

https://www.ibm.com/support/pages/node/6456955

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

IBM-6456955

Frequently Asked Questions

What is CVE-2021-20517?
CVE-2021-20517 is a vulnerability in IBM WebSphere Application Server Network Deployment 8.5 and 9.0 that allows a remote authenticated attacker to traverse directories and read/delete arbitrary files on the system.
What is the severity of CVE-2021-20517?
CVE-2021-20517 has a severity rating of 8.8, which is considered high.
How does CVE-2021-20517 impact IBM WebSphere Application Server ND?
CVE-2021-20517 allows a remote authenticated attacker to traverse directories and potentially read/delete arbitrary files on IBM WebSphere Application Server ND 8.5 and 9.0.
What is the IBM X-Force ID for CVE-2021-20517?
The IBM X-Force ID for CVE-2021-20517 is 198435.
How can I fix the CVE-2021-20517 vulnerability?
To fix the CVE-2021-20517 vulnerability, it is recommended to apply the necessary patches provided by IBM and ensure the affected versions of IBM WebSphere Application Server ND are updated to the latest version.

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vendor/ibm
canonical/ibm websphere application server nd
version/ibm websphere application server nd/8.5.0.0
version/ibm websphere application server nd/9.0.0.0
version/ibm websphere application server nd/9.0
version/ibm websphere application server nd/8.5

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