CVE-2017-6310 Debian CVE debrief

Who should care

Administrators and developers who deploy or embed tnef, especially systems that parse untrusted TNEF/MAPI content. This also matters for package maintainers and downstream distro users who rely on packaged tnef builds, including the Debian 8.0 CPE listed in NVD.

Technical summary

NVD describes four type confusions in the file_add_mapi_attrs() function in tnef before 1.4.13. The resulting memory-safety flaws may cause invalid reads and writes controlled by an attacker. NVD maps the issue to CWE-125 and CWE-787. The affected product range is listed as tnef through 1.4.12, and the record links to a patch/commit and release notes showing remediation in the upstream project references.

Defensive priority

High. This is a publicly disclosed, high-severity parser vulnerability with memory-corruption potential in a component that processes attacker-supplied input.

Recommended defensive actions

• Upgrade tnef to 1.4.13 or later, or apply the relevant vendor package update if you use a distribution build.
• Inventory hosts and applications that parse TNEF/MAPI content and verify the installed tnef version.
• Treat untrusted TNEF input as risky until patched systems are confirmed, especially in automated parsing workflows.
• Check downstream advisories and package changelogs linked in the record for distribution-specific remediation guidance.
• Use file integrity and package management checks to confirm no vulnerable tnef versions remain deployed.

Evidence notes

The vulnerability description, CVSS vector, CWE mappings, and affected-version range come from the supplied NVD record. The record identifies tnef before 1.4.13 as vulnerable and links to upstream patch/release-note references, including a GitHub commit and ChangeLog. The CVE was published on 2017-02-24 and later modified on 2026-05-13 in the supplied timeline. No KEV listing or ransomware campaign use is present in the provided data.

Official resources