Vulnerability Description
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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Tnef Project | Tnef | < 1.4.18 |
| Fedoraproject | Fedora | 30 |
| Canonical | Ubuntu Linux | 16.04 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://github.com/verdammelt/tnef/compare/1.4.17...1.4.18PatchThird Party Advisory
- https://github.com/verdammelt/tnef/pull/40ExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/11/msg00035.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/08/msg00025.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://usn.ubuntu.com/4524-1/Third Party Advisory
- https://github.com/verdammelt/tnef/compare/1.4.17...1.4.18PatchThird Party Advisory
- https://github.com/verdammelt/tnef/pull/40ExploitPatchThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2019/11/msg00035.htmlMailing ListThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2021/08/msg00025.htmlMailing ListThird Party Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedorapro
- https://usn.ubuntu.com/4524-1/Third Party Advisory
FAQ
What is CVE-2019-18849?
CVE-2019-18849 is a vulnerability with a CVSS score of 5.5 (MEDIUM). 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-bas...
How severe is CVE-2019-18849?
CVE-2019-18849 has been rated MEDIUM with a CVSS base score of 5.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2019-18849?
Check the references section above for vendor advisories and patch information. Affected products include: Tnef Project Tnef, Fedoraproject Fedora, Canonical Ubuntu Linux, Debian Debian Linux.