Security Bulletin: Vulnerability in urllib3 affects IBM Cloud Pak for Data System 1.0(CPDS 1.0)[CVE-2020-26137, CVE-2020-7212, CVE-2021-33503]

The urllib3 package is used by IBM Cloud Pak for Data System 1.0. IBM Cloud Pak for Data System 1.0 has addressed the applicable CVE [CVE-2020-26137, CVE-2020-7212, CVE-2021-33503].

## Vulnerability Details

**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-2020-7212
**DESCRIPTION:** urllib3 is vulnerable to a denial of service, caused by a flaw in the _encode_invalid_chars function in util/url.py. By sending a specially-crafted 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/177323 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)

**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 Product(s)| Version(s)
—|—
IBM Cloud Pak for Data System 1.0| 1.0.0.0- 1.0.8.4

## Remediation/Fixes

**IBM strongly recommends addressing the vulnerability now by upgrading to latest version.**

Affected Product(s)| VRMF| Remediation/Fixes
—|—|—
IBM Cloud Pak for Data System 1.0| 1.0.9.0| Link to Fix Central

## Workarounds and Mitigations

None

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