MidnightBSD mport up to 2.7.7 Package Metafiles Extraction TMPDIR redirect

Summaryinfo

A vulnerability marked as problematic has been reported in MidnightBSD mport up to 2.7.7. This vulnerability affects unknown code of the component Package Metafiles Extraction. The manipulation of the argument TMPDIR leads to redirect. This vulnerability is referenced as CVE-2026-54584. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in MidnightBSD mport up to 2.7.7. This issue affects an unknown code of the component Package Metafiles Extraction. The manipulation of the argument TMPDIR with an unknown input leads to a redirect vulnerability. Using CWE to declare the problem leads to CWE-601. A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks. Impacted is integrity. The summary by CVE is:

mport is the MidnightBSD Package Manager. mport before 2.7.8 used TMPDIR while extracting package metafiles, including when running as root or in setuid/setgid contexts. An attacker able to control the environment for a privileged mport invocation could redirect temporary metadata extraction to an attacker-controlled location. PR 123 ignores unsafe TMPDIR values in privileged contexts and rejects empty TMPDIR. This issue has been patched in version 2.7.8.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-54584 since 06/15/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1204.001 for this issue.

Upgrading to version 2.7.8 eliminates this vulnerability.

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Productinfo

Vendor

• MidnightBSD

Name

• mport

Version

• 2.7.0
• 2.7.1
• 2.7.2
• 2.7.3
• 2.7.4
• 2.7.5
• 2.7.6
• 2.7.7

Website

• Product: https://github.com/MidnightBSD/mport/

CPE 2.3info

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CPE 2.2info

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