CVE-2019-18849 Information

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 Vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Reference

https://github.com/verdammelt/tnef/compare/1.4.17…1.4.18 https://github.com/verdammelt/tnef/pull/40 https://lists.debian.org/debian-lts-announce/2019/11/msg00035.html https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RMKFSHPMOZL7MDWU5RYOTIBTRWSZ4Z6X/ https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/W7CPKBW4QZ4VIY4UXIUVUSHRJ4R2FROE/ https://usn.ubuntu.com/4524-1/

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

REQUIRED

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5