TI-2019-13584 Aliases CVE-2019-18849 GHSA-cq6j-h35c-x8gr

In tnef before 1.4.18, an attacker may be able to write to the victim's…

LOW 27CWE-125Published 2019-11-11 · Updated 2024-08-05

Key facts

Attack vector: Local
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Denial of service
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-125 and the CVSS impact.

Summary

In tnef before 1.4.18, an attacker may be able to write to the victim's .ssh/authorized_keys file via an e-mail message with a crafted winmail.dat application/ms-tnef attachment, because of a heap-based buffer over-read involving strdup.

Why it matters now

EPSS 0.01213 68th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 5

CPE	Versions	Role	Vendor
cpe:2.3:a:tnef_project:tnef::::::::	before 1.4.18	Vulnerable	Tnef Project
cpe:2.3:o:fedoraproject:fedora:30:::::::*	30	Vulnerable	Fedoraproject
cpe:2.3:o:fedoraproject:fedora:31:::::::*	31	Vulnerable	Fedoraproject
cpe:2.3:o:canonical:ubuntu_linux:16.04::::esm:::	16.04	Vulnerable	Canonical
cpe:2.3:o:debian:debian_linux:8.0:::::::*	8.0	Vulnerable	Debian

cpe:2.3:a:tnef_project:tnef:*:*:*:*:*:*:*:* Versions before 1.4.18 Vulnerable ·Tnef Project
cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:* Versions 30 Vulnerable ·Fedoraproject
cpe:2.3:o:fedoraproject:fedora:31:*:*:*:*:*:*:* Versions 31 Vulnerable ·Fedoraproject
cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:* Versions 16.04 Vulnerable ·Canonical
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian

Remediation

No fixed version listed by the sources yet.

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product

Red Hat

Timeline

2026-10-02 Threatist record created from CVE-2019-18849
2026-10-03 Alias added: GHSA-cq6j-h35c-x8gr

References

Exploit 1

https://github.com/verdammelt/tnef/pull/40

Patch 1

https://github.com/verdammelt/tnef/compare/1.4.17...1.4.18

Advisory 5

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences