mport is the MidnightBSD Package Manager. Prior to 2.7.8, directory assets handled as ASSET_DIR or ASSET_DIR_OWNER_MODE in libmport/bundle_read_install_pkg.c used path-based mport_mkdirp(), ownership, and permission operations. A local attacker able to modify part of the target installation tree could use dot-dot traversal or substitute symlinks during privileged package installation, causing directory creation or attribute changes to affect attacker-selected paths outside the intended package directories.
This issue is fixed in version 2.7.8.
Attack Parameters
Attack Vector
Local
Requires local access
Attack Complexity
High
Difficult to exploit
Attack Requirements
Present
Additional conditions required
Privileges Required
Low
Basic privileges needed
User Interaction
None
No user interaction needed
Impact Assessment
Confidentiality
None
No data leak
Integrity
High
Complete data modification
Availability
Low
Partial disruption
CVSS Vector v4.0
Weakness Type (CWE)
References 4
https://github.com/MidnightBSD/mport/commit/a4fa996df1fbebeff3691e1b512c807b5f4…
security-advisories@github.com
https://github.com/MidnightBSD/mport/pull/119
security-advisories@github.com
https://github.com/MidnightBSD/mport/releases/tag/2.7.8
security-advisories@github.com
https://github.com/MidnightBSD/mport/security/advisories/GHSA-f69w-h3gh-r86p
security-advisories@github.com