Security Bulletin
Summary
There are multiple vulnerabilities in the IBM HTTP Server used by WebSphere Application Server. This has been addressed.
Vulnerability Details
DESCRIPTION: Apache HTTP Server is vulnerable to a denial of service, caused by the improper handling of insufficient privileges. A local attacker could exploit this vulnerability to stop httpd on Windows, resulting in a denial of service.
CVSS Base score: 6.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/203460 for the current score.
CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2021-30641
DESCRIPTION: Apache HTTP Server could provide weaker than expected security, caused by unexpected URL matching behavior with MergeSlashes OFF. An attacker could exploit this vulnerability to match URLs from all sites in the same domain and launch further attacks on the system.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/203459 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N)
Affected Products and Versions
This vulnerability affects the following version and release of IBM HTTP Server (powered by Apache) component in all editions of WebSphere Application Server and bundling products.
| Affected Product(s) | Version(s) |
| IBM HTTP Server | 9.0 |
| IBM HTTP Server | 8.5 |
| IBM HTTP Server | 8.0 |
| IBM HTTP Server | 7.0 |
Remediation/Fixes
For V9.0.0.0 through 9.0.5.7:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH35771
--OR--
· Apply Fix Pack 9.0.5.8 or later (targeted availability 2Q2021).
For V8.5.0.0 through 8.5.5.19:
· Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix PH35771
--OR--
· Apply Fix Pack 8.5.5.20 or later (targeted availability 3Q2021).
For V8.0.0.0 through 8.0.0.15:
· Upgrade to 8.0.0.15 and then apply Interim Fix PH35771
For V7.0.0.0 through 7.0.0.45:
· Upgrade to 7.0.0.45 and then apply Interim Fix PH35771
Additional interim fixes may be available and linked off the interim fix download page.
IBM HTTP 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.
Important Note
IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and
integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will
be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential
risk.
Workarounds and Mitigations
Get Notified about Future Security Bulletins
References
Change History
15 Jun 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
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
Document Location
Worldwide
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Document Information
Modified date:
17 June 2021
UID
ibm16464029