CVE-2019-11365 Information

Description

An issue was discovered in atftpd in atftp 0.7.1. A remote attacker may send a crafted packet triggering a stack-based buffer overflow due to an insecurely implemented strncpy call. The vulnerability is triggered by sending an error packet of 3 bytes or fewer. There are multiple instances of this vulnerable strncpy pattern within the code base specifically within tftpd_file.c tftp_file.c tftpd_mtftp.c and tftp_mtftp.c.

CVSS Vector

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Reference

https://lists.debian.org/debian-lts-announce/2019/05/msg00012.html https://pulsesecurity.co.nz/advisories/atftpd-multiple-vulnerabilities https://seclists.org/bugtraq/2019/May/16 https://security.gentoo.org/glsa/202003-14 https://sourceforge.net/p/atftp/code/ci/abed7d245d8e8bdfeab24f9f7f55a52c3140f96b/ https://usn.ubuntu.com/4540-1/ https://www.debian.org/security/2019/dsa-4438

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

9.8