PT-2021-14000 · Ibm · Ibm I

Published 2021-04-21 · Updated 2022-07-12 · CVE-2021-20501

Positive Technologies (AI Summary)

CVSS v3.1

8.2

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Name of the Vulnerable Software and Affected Versions: IBM i versions 7.1 through 7.4

Description: The issue allows a network attacker to send emails to non-existent local-domain recipients to the SMTP server, caused by using a non-default configuration. This could be exploited to consume unnecessary network bandwidth and disk space, and allow remote attackers to send spam email.

Recommendations: For IBM i versions 7.1 through 7.4, consider changing the SMTP configuration to prevent sending emails to non-existent local-domain recipients as a mitigation measure. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Related Identifiers

CVE-2021-20501

Affected Products

Ibm I

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2021-20501 · Security Note
• https://ibm.com/support/pages/node/6445505 · Vendor Advisory
• https://exchange.xforce.ibmcloud.com/vulnerabilities/198056 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-20501 · Vendor Advisory