DescriptionIncluded in Log4j 1.2 is a SocketServer class that is vulnerable to deserialization of untrusted data which can be exploited to remotely execute arbitrary code when combined with a deserialization gadget when listening to untrusted network traffic for log data. This affects Log4j versions up to 1.2 up to 1.2.17.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub code/issues, web search, more)
ReferencesDLA-2065-1, DSA-4686-1
NVD severityhigh
Debian Bugs947124

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
apache-log4j1.2 (PTS)stretch (security), stretch1.2.17-7+deb9u1fixed
buster, buster (security)1.2.17-8+deb10u1fixed
bullseye, sid1.2.17-10fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs

CVE-2019-17571 correspond to CVE-2017-5645 for apache-log4j2. 1.2.x branch
is end-of-life upstream and does not recieve a fix for this issue. Users
should upgrade to Log4j 2.x.
Fixed by

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