An issue was discovered in Zimbra Collaboration (ZCS) 8.8.15 and 9.0. An attacker can upload arbitrary files through amavis via a cpio loophole (extraction to /opt/zimbra/jetty/webapps/zimbra/public) that can lead to incorrect access to any other user accounts. Zimbra recommends pax over cpio. Also, pax is in the prerequisites of Zimbra on Ubuntu; however, pax is no longer part of a default Red Hat installation after RHEL 6 (or CentOS 6). Once pax is installed, amavis automatically prefers it over cpio.

Debian's cpio contains a path traversal vulnerability. This issue was introduced by reverting CVE-2015-1197 patches which had caused a regression in --no-absolute-filenames. Upstream has since provided a proper fix to --no-absolute-filenames.

Rejected reason: DO NOT USE THIS CANDIDATE NUMBER. ConsultIDs: CVE-2015-1197. Reason: This candidate is a duplicate of CVE-2015-1197. Notes: All CVE users should reference CVE-2015-1197 instead of this candidate. All references and descriptions in this candidate have been removed to prevent accidental usage.

cpio 2.11, when using the --no-absolute-filenames option, allows local users to write to arbitrary files via a symlink attack on a file in an archive.