CVE-2021-38951: WebSphere Application Server is vulnerable to a Denial of Service (CVE-2021-38951)

Security Bulletin

Summary

WebSphere Application Server is vulnerable to a Denial of Service. This has been addressed.

Vulnerability Details

CVEID: CVE-2021-38951
DESCRIPTION: IBM WebSphere Application Server is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume all available CPU resources.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/211405 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Affected Products and Versions

Affected Product(s)

Version(s)

WebSphere Application Server

9.0

WebSphere Application Server

8.5

WebSphere Application Server

8.0

WebSphere Application Server

7.0

Remediation/Fixes

For WebSphere Application Server traditional and WebSphere Application Server Hypervisor Edition:

For V9.0.0.0 through 9.0.5.10:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH41676
–OR–
· Apply Fix Pack 9.0.5.11 or later (targeted availability 1Q2022).

For V8.5.0.0 through 8.5.5.20:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH41676
–OR–
· Apply Fix Pack 8.5.5.21 or later (targeted availability 1Q2022).

For V8.0.0.0 through 8.0.0.15:
· Upgrade to 8.0.0.15 and then apply Interim Fix PH41676

For V7.0.0.0 through 7.0.0.45:
· Upgrade to 7.0.0.45 and then apply Interim Fix PH41676

Additional interim fixes may be available and linked off the interim fix download page.

WebSphere Application Server V7.0 and V8.0 are no longer in full support; IBM recommends upgrading to a fixed, supported version/release/platform of the product.

Workarounds and Mitigations

None

References

Off

Acknowledgement

The vulnerability was reported to IBM by r00t4dm at Cloud-Penetrating Arrow Lab of Meituan Corp Information Security Department

Change History

08 Dec 2021: Initial Publication

*The CVSS Environment Score is customer environment specific and will ultimately impact the Overall CVSS Score. Customers can evaluate the impact of this vulnerability in their environments by accessing the links in the Reference section of this Security Bulletin.

Disclaimer

According to the Forum of Incident Response and Security Teams (FIRST), the Common Vulnerability Scoring System (CVSS) is an “industry open standard designed to convey vulnerability severity and help to determine urgency and priority of response.” IBM PROVIDES THE CVSS SCORES “"AS IS"” WITHOUT WARRANTY OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.

Document Location

Worldwide

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