Multiple issues were identified within the libcurl library that affect IBM MQ. IBM MQ uses libcurl to provide HTTPURL functionality which is only used to download remote CCDT files and is not used to send or receive messages.
DESCRIPTION: cURL libcurl could allow a remote attacker to bypass security restrictions, caused by a flaw that wrongly accepts percent-encoded URL separators like '/' by the URL parser. By sending a specially-crafted host name in a URL, an attacker could exploit this vulnerability to bypass filters and checks for URL.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/226250 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N)
DESCRIPTION: cURL libcurl could allow a remote attacker to obtain sensitive information, caused by a HSTS check bypass flaw. By sending a specially-crafted request using a host name in the an URL with a trailing dot, an attacker could exploit this vulnerability to obtain sensitive information over clear-text HTTP, and use this information to launch further attacks against the affected system.
CVSS Base score: 7.5
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/226253 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N)
Affected Products and Versions
|IBM MQ||9.1 LTS|
|IBM MQ||9.0 LTS|
|IBM MQ||9.2 CD|
|IBM MQ||9.1 CD|
|IBM MQ||9.2 LTS|
This issue was resolved under APAR IT40933
IBM MQ Version 9.0
IBM MQ Version 9.1 LTS
IBM MQ Version 9.2 LTS
IBM MQ Version 9.1 CD and Version 9.2 CD
Workarounds and Mitigations
Get Notified about Future Security Bulletins
22 August 2022: Initial Publication
25 August 2022: Updated description to clearly indicate IBM MQ's usage of libcurl.
*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.
Review the IBM security bulletin disclaimer and definitions regarding your responsibilities for assessing potential impact of security vulnerabilities to your environment.
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25 August 2022