Vulnerability Details : CVE-2021-20501
IBM i 7.1, 7.2, 7.3, and 7.4 SMTP allows a network attacker to send emails to non-existent local-domain recipients to the SMTP server, caused by using a non-default configuration. An attacker could exploit this vulnerability to consume unnecessary network bandwidth and disk space, and allow remote attackers to send spam email. IBM X-Force ID: 198056.
Products affected by CVE-2021-20501
- cpe:2.3:o:ibm:i:7.1:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:i:7.2:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:i:7.3:*:*:*:*:*:*:*
- cpe:2.3:o:ibm:i:7.4:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-20501
0.13%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 47 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-20501
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.4
|
MEDIUM | AV:N/AC:L/Au:N/C:N/I:P/A:P |
10.0
|
4.9
|
NIST | |
|
5.9
|
MEDIUM | CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H |
2.2
|
3.6
|
IBM Corporation | |
|
8.2
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H |
3.9
|
4.2
|
NIST |
References for CVE-2021-20501
-
https://exchange.xforce.ibmcloud.com/vulnerabilities/198056
IBM i denial of service CVE-2021-20501 Vulnerability ReportVDB Entry;Vendor Advisory
-
https://www.ibm.com/support/pages/node/6445505
Security Bulletin: SMTP for IBM i is affected by CVE-2021-20501Vendor Advisory
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