A flaw was found in mbsync before v1.3.5 and v1.4.1. mbsync doesn't validate the mailbox names returned by IMAP LIST/LSUB, which allows a malicious/compromised server to use specially crafted mailbox names containing '..' path components to access data outside the designated mailbox on the opposite end of the synchronization channel.
Created isync tracking bugs for this issue:
Affects: epel-all [bug 1931598]
Affects: fedora-all [bug 1931597]
This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.