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AUSCERT External Security Bulletin Redistribution
ESB-2021.3250
Security Bulletin: Multiple vulnerabilities in IBM HTTP
Server used by WebSphere Application Server
30 September 2021
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: IBM HTTP Server
Publisher: IBM
Operating System: Linux variants
Windows
Solaris
HP-UX
AIX
z/OS
Impact/Access: Denial of Service -- Remote/Unauthenticated
Access Confidential Data -- Remote/Unauthenticated
Reduced Security -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2021-40438 CVE-2021-39275 CVE-2021-34798
Reference: ESB-2021.3239
ESB-2021.3234
ESB-2021.3229
ESB-2021.3148
Original Bulletin:
https://www.ibm.com/support/pages/node/6493841
https://www.ibm.com/support/pages/node/6493845
Comment: This bulletin contains two (2) IBM security advisories.
- --------------------------BEGIN INCLUDED TEXT--------------------
Security Bulletin: Multiple vulnerabilities in IBM HTTP Server used by
WebSphere Application Server
Document Information
Product : IBM HTTP Server
Software version : 9.0
Operating system(s): AIX
HP-UX
Linux
Solaris
Windows
z/OS
Edition : Base,Enterprise,Advanced,Single Server,Network Deployment
Summary
There are multiple vulnerabilities in the IBM HTTP Server used by WebSphere
Application Server. This has been addressed.
Vulnerability Details
CVEID: CVE-2021-34798
DESCRIPTION: Apache HTTP Server is vulnerable to a denial of service, caused
by a NULL pointer dereference in httpd core. By sending a specially crafted
request, a remote attacker could exploit this vulnerability to cause a denial
of service.
CVSS Base score: 5.9
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities
/209518 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVEID: CVE-2021-40438
DESCRIPTION: Apache HTTP Server is vulnerable to server-side request forgery,
caused by an error in mod_proxy. By sending a specially crafted request
uri-path, a remote attacker could exploit this vulnerability to forward the
request to an origin server chosen by the remote user.
CVSS Base score: 7.4
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities
/209526 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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 |
+-------------------+----------+
Remediation/Fixes
For IBM HTTP Server used by WebSphere Application Server:
For V9.0.0.0 through 9.0.5.9:
Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH40343
- --OR--
Apply Fix Pack 9.0.5.10 or later (targeted availability 4Q2021).
Additional interim fixes may be available and linked off the interim fix
download page.
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
None
Change History
29 Sep 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
- --------------------------------------------------------------------------------
Security Bulletin: Vulnerability in IBM HTTP Server used by WebSphere
Application Server
Document Information
Product : IBM HTTP Server
Software version : 7.0, 8.0, 8.5, 9.0
Operating system(s): AIX
HP-UX
Linux
Solaris
Windows
z/OS
Edition : Base,Enterprise,Advanced,Single Server,Network Deployment
Summary
There is a vulnerability in the IBM HTTP Server used by WebSphere Application
Server. This has been addressed.
Vulnerability Details
CVEID: CVE-2021-39275
DESCRIPTION: Apache HTTP Server is vulnerable to a buffer overflow, caused by
improper bounds checking by the ap_escape_quotes() function. By sending
specially crafted input, a remote attacker could write beyond the end of a
buffer.
CVSS Base score: 3.7
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities
/209529 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:H/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 IBM HTTP Server used by WebSphere Application Server:
For V9.0.0.0 through 9.0.5.9:
Upgrade to minimal fix pack levels as required by interim fix and then apply
Interim Fix PH40343
- --OR--
Apply Fix Pack 9.0.5.10 or later (targeted availability 4Q2021).
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 PH40343
- --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 PH40343
For V7.0.0.0 through 7.0.0.45:
Upgrade to 7.0.0.45 and then apply Interim Fix PH40343
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
None
Change History
29 Sep 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
- --------------------------END INCLUDED TEXT--------------------
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