1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 3.0.0
Versions Affected: Apache Ant 1.1 to 1.9.14 and 1.10.0 to 1.10.7
Medium: insecure temporary file vulnerability CVE-2020-1945
Apache Ant uses the default temporary directory identified by the Java system property java.io.tmpdir for several tasks and may thus leak sensitive information. The fixcrlf and replaceregexp tasks also copy files from the temporary directory back into the build tree allowing an attacker to inject modified source files into the build process.
Mitigation: Ant users of versions 1.1 to 1.9.14 and 1.10.0 to 1.10.7 should set the java.io.tmpdir system property to point to a directory only readable and writable by the current user prior to running Ant.
Users of versions 1.9.15 and 1.10.8 can use the Ant property ant.tmpfile instead. Users of Ant 1.10.8 can rely on Ant protecting the temporary files if the underlying filesystem allows it, but we still recommend using a private temporary directory instead.
This was first reported to the Security Team on 29 January 2020 and made public on 13 May 2020
Affects: until 1.10.7