Advisories for Pypi/Borgbackup package

A maliciously crafted archive could contain a symlink (e.g. "evil" -> "/etc") followed by an item below it ("evil/passwd"), or an item whose path embeds ".." (e.g. "a/../../etc/passwd"). When extracting such items, borg followed the symlink / resolved the "..", so it could delete or overwrite files outside the extraction directory. In a quite similar scenario, a crafted archive could contain a slave hardlink item with the hardlink source pointing …

A flaw in the cryptographic authentication scheme in borgbackup allowed an attacker to fake archives and potentially indirectly cause backup data loss in the repository. The attack requires an attacker to be able to insert files (with no additional headers) into backups gain write access to the repository This vulnerability does not disclose plaintext to the attacker, nor does it affect the authenticity of existing archives. Creating plausible fake archives …

Incorrect implementation of access controls allows remote users to override repository restrictions in Borg servers 1.1.x before 1.1.3.