| 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. Fixed in Apache Log4j 2.12.3 and 2.13.1 |
| Source | CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
| References | DLA-2852-1 |
| Debian Bugs | 959450 |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| apache-log4j2 (PTS) | buster | 2.17.1-1~deb10u1 | fixed |
| buster (security) | 2.17.0-1~deb10u1 | fixed |
| bullseye | 2.17.1-1~deb11u1 | fixed |
| bullseye (security) | 2.17.0-1~deb11u1 | fixed |
| sid, trixie, bookworm | 2.19.0-2 | fixed |
The information below is based on the following data on fixed versions.
Notes
[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)