CVE-2021-20247

https://notcve.org/view.php?id=CVE-2021-20247

A flaw was found in mbsync before v1.3.5 and v1.4.1. Validations of the mailbox names returned by IMAP LIST/LSUB do not occur allowing a malicious or 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. The highest threat from this vulnerability is to data confidentiality and integrity. Se encontró un fallo en mbsync versiones anteriores a v1.3.5 y v1.4.1. Las comprobaciones de los nombres de buzones devueltos por IMAP LIST/LSUB no ocurren, permitiendo a un servidor malicioso o comprometido utilizar nombres de buzones especialmente diseñados que contengan componentes de ruta ".." para acceder a datos fuera del buzón designado en el extremo opuesto del canal de sincronización. • https://bugzilla.redhat.com/show_bug.cgi?id=1928963 https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CAXQLCK35QGRCRENRTGKJO4VVZGUXUJJ https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GVDEBZQJMWDW5JFK4NTHH6DAFNAZTESW https://security.gentoo.org/glsa/202208-15 https://www.openwall.com/lists/oss-security/2021/02/22/1 • CWE-20: Improper Input Validation CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') •