CVE-2021-33502: High severity IBM Sterling External Authentication Server vulnerability

Published May 21, 2021
·
Updated

A flaw was found in normalize-url. Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data.

Other sources

Node.js normalize-url module is vulnerable to a denial of service, caused by a ReDoS (regular expression denial of service) flaw in the data URLs. By using a specially-crafted regex input, a remote attacker could exploit this vulnerability to cause a denial of service condition.

— IBM

The normalize-url package before 4.5.1, 5.x before 5.3.1, and 6.x before 6.0.1 for Node.js has a ReDoS (regular expression denial of service) issue because it has exponential performance for data: URLs.

Affected Software

17 affected componentsFixes available
redhat/nodejs-nodemon<0:2.0.19-1.el9_0
0:2.0.19-1.el9_0
redhat/rh-nodejs12-nodejs<0:12.22.2-1.el7
0:12.22.2-1.el7
redhat/rh-nodejs12-nodejs-nodemon<0:2.0.3-2.el7
0:2.0.3-2.el7
redhat/rh-nodejs14-nodejs<0:14.17.2-1.el7
0:14.17.2-1.el7
redhat/rh-nodejs14-nodejs-nodemon<0:2.0.3-2.el7
0:2.0.3-2.el7
redhat/ovirt-engine-ui-extensions<0:1.3.3-1.el8e
0:1.3.3-1.el8e
redhat/ovirt-web-ui<0:1.8.1-2.el8e
0:1.8.1-2.el8e
npm/normalize-url>=4.3.0<4.5.1
4.5.1
npm/normalize-url>=6.0.0<6.0.1
6.0.1
npm/normalize-url>=5.0.0<5.3.1
5.3.1
redhat/normalize-url<4.5.1
4.5.1
redhat/normlize-url<5.3.1
5.3.1
redhat/normalize-url<6.0.1
6.0.1
IBM Sterling External Authentication Server<=6.1.0
Normalize-url Project Normalize-url Node.js>=4.3.0<4.5.1
Normalize-url Project Normalize-url Node.js>=5.0.0<5.3.1
Normalize-url Project Normalize-url Node.js=6.0.0

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade redhat/nodejs-nodemon to a version that resolves this vulnerability.

    Fixed in 0:2.0.19-1.el9_0
  2. Upgrade

    Upgrade redhat/rh-nodejs12-nodejs to a version that resolves this vulnerability.

    Fixed in 0:12.22.2-1.el7
  3. Upgrade

    Upgrade redhat/rh-nodejs12-nodejs-nodemon to a version that resolves this vulnerability.

    Fixed in 0:2.0.3-2.el7
  4. Upgrade

    Upgrade redhat/rh-nodejs14-nodejs to a version that resolves this vulnerability.

    Fixed in 0:14.17.2-1.el7
  5. Upgrade

    Upgrade redhat/rh-nodejs14-nodejs-nodemon to a version that resolves this vulnerability.

    Fixed in 0:2.0.3-2.el7
  6. Upgrade

    Upgrade redhat/ovirt-engine-ui-extensions to a version that resolves this vulnerability.

    Fixed in 0:1.3.3-1.el8e
  7. Upgrade

    Upgrade redhat/ovirt-web-ui to a version that resolves this vulnerability.

    Fixed in 0:1.8.1-2.el8e
  8. Upgrade

    Upgrade npm/normalize-url to a version that resolves this vulnerability.

    Fixed in 4.5.1
  9. Upgrade

    Upgrade npm/normalize-url to a version that resolves this vulnerability.

    Fixed in 6.0.1
  10. Upgrade

    Upgrade npm/normalize-url to a version that resolves this vulnerability.

    Fixed in 5.3.1
  11. Upgrade

    Upgrade redhat/normalize-url to a version that resolves this vulnerability.

    Fixed in 4.5.1
  12. Upgrade

    Upgrade redhat/normlize-url to a version that resolves this vulnerability.

    Fixed in 5.3.1
  13. Upgrade

    Upgrade redhat/normalize-url to a version that resolves this vulnerability.

    Fixed in 6.0.1
  14. Upgrade

    Upgrade normalize-url to a version that resolves this vulnerability.

    Fixed in 4.5.1
  15. Upgrade

    Upgrade normalize-url to a version that resolves this vulnerability.

    Fixed in 5.3.1
  16. Upgrade

    Upgrade normalize-url to a version that resolves this vulnerability.

    Fixed in 6.0.1

Event History

May 21, 2021
CVE Published
12:00 AM
May 24, 2021
CVE Published
via MITRE·03:42 PM
Data Sourced
via MITRE·03:42 PM
Description
Data Sourced
via NVD·04:15 PM
DescriptionSeverityWeaknessAffected Software
May 25, 2021
Data Sourced
via Red Hat·02:26 PM
DescriptionSeverityAffected Software
Jun 8, 2021
Advisory Published
11:11 PM

Parent advisories

This vulnerability appears in the following advisories.

Frequently Asked Questions

1

What is CVE-2021-33502?

CVE-2021-33502 is a vulnerability in the normalize-url module in Node.js that allows for a denial of service attack.

2

What is the severity of CVE-2021-33502?

CVE-2021-33502 is classified as a high severity vulnerability with a severity rating of 7.5.

3

How does CVE-2021-33502 impact normalize-url?

CVE-2021-33502 impacts normalize-url by causing a denial of service condition.

4

How can CVE-2021-33502 be fixed?

To fix CVE-2021-33502, update normalize-url to version 4.5.1 or higher.

5

Where can I find more information about CVE-2021-33502?

You can find more information about CVE-2021-33502 on the NVD website.

Company

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