Security Bulletin: Vulnerabilities in Apache HTTP (CVE-2021-33193 and CVE-2021-44224) affects Power HMC

Summary

Apache HTTP webserver is used by IBM Power Hardware Management Console (HMC) for accepting https request and transfer to and fro to internal applications. This bulletin provides a remediation for the impacted vulnerabilities, CVE-2021-33193 and CVE-2021-44224 by upgrading IBM Power Hardware Management Console (HMC) respective PTF and thus addressing the exposure to the vulnerability.

Vulnerability Details

CVEID:CVE-2021-33193
**DESCRIPTION:**Apache HTTP Server is vulnerable to HTTP request splitting attacks, caused by improper input validation in HTTP/2 message processing. A remote attacker could exploit this vulnerability to inject arbitrary HTTP request and cause the browser to send 2 HTTP requests, once the URL is clicked. This would allow the attacker to perform further attacks, such as Web cache poisoning or cross-site scripting.
CVSS Base score: 6.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/207923 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N)

CVEID:CVE-2021-44224
**DESCRIPTION:**Apache HTTP Server is vulnerable to a denial of service or server-side request forgery. By sending a specially crafted URI to httpd configured as a forward proxy, an attacker could exploit this vulnerability to cause a NULL pointer dereference. By sending a specially crafted URI to configurations mixing forward and reverse proxy declarations, an attacker could allow for requests to be directed to a declared Unix Domain Socket endpoint.
CVSS Base score: 8.2
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/215719 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H)

Affected Products and Versions

Remediation/Fixes

The following fixes are available on IBM Fix Central at: <http://www-933.ibm.com/support/fixcentral/&gt;

Product

|

VRMF

|

APAR

|

Remediation/Fix

—|—|—|—

Power HMC

|

V9.2.950.0 SP3 ppc

|

MB04373

|

MH01944

Power HMC

|

V9.2.950.0 SP3 x86

|

MB04372

|

MH01943

Power HMC

|

V10.1.1020.0 SP1 ppc

|

MB04363

|

MF70302

Power HMC

|

V10.1.1020.0 SP1 x86

|

MB04362

|

MF70301

Workarounds and Mitigations

None