CVE-2021-20354 : IBM WebSphere Application Server 8.0, 8.5, and 9.0 could allow a remote attacker

IBM WebSphere Application Server 8.0, 8.5, and 9.0 could allow a remote attacker to traverse directories. An attacker could send a specially-crafted URL request containing "dot dot" sequences (/../) to view arbitrary files on the system. IBM X-Force ID: 194883.

Published 2021-02-18 15:15:14

Updated 2021-02-22 20:05:55

Source IBM Corporation

View at NVD, CVE.org

Vulnerability category: Directory traversal

Products affected by CVE-2021-20354

IBM » Websphere Application Server
Versions from including (>=) 8.0.0.0 and up to, including, (<=) 8.0.0.15
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:*:*:*:*
Matching versions
When used together with: HP » Hp-ux » Version: N/A
When used together with: IBM » AIX » Version: N/A
When used together with: IBM » I » Version: N/A
When used together with: IBM » Z/os » Version: N/A
When used together with: Linux » Linux Kernel » Version: N/A
When used together with: Microsoft » Windows » Version: N/A
When used together with: Oracle » Solaris » Version: N/A
IBM » Websphere Application Server
Versions from including (>=) 9.0.0.0 and up to, including, (<=) 9.0.5.6
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:*:*:*:*
Matching versions
When used together with: HP » Hp-ux » Version: N/A
When used together with: IBM » AIX » Version: N/A
When used together with: IBM » I » Version: N/A
When used together with: IBM » Z/os » Version: N/A
When used together with: Linux » Linux Kernel » Version: N/A
When used together with: Microsoft » Windows » Version: N/A
When used together with: Oracle » Solaris » Version: N/A
IBM » Websphere Application Server
Versions from including (>=) 8.5.0.0 and up to, including, (<=) 8.5.5.19
cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:*:*:*:*
Matching versions
When used together with: HP » Hp-ux » Version: N/A
When used together with: IBM » AIX » Version: N/A
When used together with: IBM » I » Version: N/A
When used together with: IBM » Z/os » Version: N/A
When used together with: Linux » Linux Kernel » Version: N/A
When used together with: Microsoft » Windows » Version: N/A
When used together with: Oracle » Solaris » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2021-20354

EPSS FAQ

0.23%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 61 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2021-20354

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
7.8	HIGH	AV:N/AC:L/Au:N/C:C/I:N/A:N	10.0	6.9	NIST
Access Vector: Network Access Complexity: Low Authentication: None Confidentiality Impact: Complete Integrity Impact: None Availability Impact: None
5.9	MEDIUM	CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N	2.2	3.6	IBM Corporation
Attack Vector: Network Attack Complexity: High Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None
7.5	HIGH	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	3.9	3.6	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: None User Interaction: None Scope: Unchanged Confidentiality: High Integrity: None Availability: None

CWE ids for CVE-2021-20354

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2021-20354

https://www.ibm.com/support/pages/node/6415959

Security Bulletin: WebSphere Application Server is vulnerable to a directory traversal vulnerability (CVE-2021-20354)
Patch;Vendor Advisory
https://exchange.xforce.ibmcloud.com/vulnerabilities/194883

IBM WebSphere Application Server information disclosure CVE-2021-20354 Vulnerability Report
VDB Entry;Vendor Advisory

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Vulnerability Details : CVE-2021-20354

Products affected by CVE-2021-20354

Exploit prediction scoring system (EPSS) score for CVE-2021-20354

CVSS scores for CVE-2021-20354

CWE ids for CVE-2021-20354

References for CVE-2021-20354