| Name | CVE-2020-9488 |
| Description | Improper validation of certificate with host mismatch in Apache Log4j SMTP appender. 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. |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more) |
| NVD severity | medium |
| Debian Bugs | 959450 |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| apache-log4j2 (PTS) | stretch | 2.7-2 | vulnerable |
| buster | 2.11.1-2 | vulnerable | |
| bullseye, sid | 2.11.2-1 | vulnerable |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|---|---|---|---|---|---|
| apache-log4j2 | source | (unstable) | (unfixed) | 959450 |
[buster] - apache-log4j2 <no-dsa> (Minor issue)
[stretch] - apache-log4j2 <no-dsa> (Minor issue; set mail.smtp.ssl.checkserveridentity to true to enable hostname verification)
[jessie] - apache-log4j2 <no-dsa> (Minor issue; set mail.smtp.ssl.checkserveridentity to true to enable hostname verification)
https://www.openwall.com/lists/oss-security/2020/04/25/1
https://issues.apache.org/jira/browse/LOG4J2-2819
https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=6851b5083ef9610bae320bf07e1f24d2aa08851b (release-2.x)
https://gitbox.apache.org/repos/asf?p=logging-log4j2.git;h=fb91a3d71e2f3dadad6fd1beb2ab857f44fe8bbb (master)