Security Bulletin: IBM Cloud Pak for Data Scheduling is vulnerable to multiple vulnerabilities (CVE-2019-11236, CVE-2020-26137, CVE-2021-33503)

Summary

Urllib is used by IBM Cloud Pak for Data Scheduling as part of the Ansible operator used for installation of the Scheduler.

Vulnerability Details

CVEID:CVE-2019-11236
**DESCRIPTION:**Python urllib3 is vulnerable to CRLF injection, caused by improper validation of user-supplied input by the request parameter. By sending a specially-crafted HTTP response containing CRLF character sequences, a remote attacker could exploit this vulnerability to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/159527 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)

CVEID:CVE-2020-26137
**DESCRIPTION:**urllib3 is vulnerable to CRLF injection. By inserting CR and LF control characters in the first argument of putrequest(), a remote attacker could exploit this vulnerability to conduct various attacks against the vulnerable system, including cross-site scripting, cache poisoning or session hijacking.
CVSS Base score: 6.1
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/189426 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-2021-33503
**DESCRIPTION:**urllib3 is vulnerable to a denial of service, caused by a regular expression denial of service (ReDoS) flaw due to catastrophic backtracking. By sending a specially-crafted URL request, a remote attacker could exploit this vulnerability to cause a denial of service condition.
CVSS Base score: 5.3
CVSS Temporal Score: See: https://exchange.xforce.ibmcloud.com/vulnerabilities/203109 for the current score.
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)

Affected Products and Versions

Affected Products/Versions guidance:

Affected Product(s)|**Version(s)
**
—|—
IBM Cloud Pak for Data Scheduling| 4.6.4 - 4.7.4

Remediation/Fixes

Remediation/Fixes guidance:

IBM recommends addressing the vulnerability now.

Workarounds and Mitigations

Workarounds/Mitigation guidance:

None