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Improper validation of certificate with host mismatch in Apache Log4j SMTP appender

Low severity GitHub Reviewed Published Jun 5, 2020 to the GitHub Advisory Database • Updated Feb 5, 2024

Package

maven org.apache.logging.log4j:log4j (Maven)

Affected versions

>= 2.13.0, < 2.13.2
>= 2.4.0, < 2.12.3
< 2.3.2

Patched versions

2.13.2
2.12.3
2.3.2
maven org.apache.logging.log4j:log4j-core (Maven)
>= 2.13.0, < 2.13.2
>= 2.4.0, < 2.12.3
< 2.3.2
2.13.2
2.12.3
2.3.2

Description

Improper validation of certificate with host mismatch in Apache Log4j SMTP appender prior to version 2.13.2. This could allow an SMTPS connection to be intercepted by a man-in-the-middle attack which could leak any log messages sent through that appender.

References

Published by the National Vulnerability Database Apr 27, 2020
Reviewed Jun 4, 2020
Published to the GitHub Advisory Database Jun 5, 2020
Last updated Feb 5, 2024

Severity

Low
3.7
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Weaknesses

CVE ID

CVE-2020-9488

GHSA ID

GHSA-vwqq-5vrc-xw9h

Source code

No known source code

Credits

Checking history
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