CVE-2019-11366

MEDIUM

atftp 0.7.1 - Denial of Service via NULL Pointer Dereference in Thread List Handling

Title source: llm
STIX 2.1

Description

An issue was discovered in atftpd in atftp 0.7.1. It does not lock the thread_list_mutex mutex before assigning the current thread data structure. As a result, the daemon is vulnerable to a denial of service attack due to a NULL pointer dereference. If thread_data is NULL when assigned to current, and modified by another thread before a certain tftpd_list.c check, there is a crash when dereferencing current->next.

References (7)

Core 7
Core References
Exploit, Third Party Advisory x_refsource_misc
https://pulsesecurity.co.nz/advisories/atftpd-multiple-vulnerabilities
Third Party Advisory vendor-advisory x_refsource_debian
https://www.debian.org/security/2019/dsa-4438
Mailing List mailing-list x_refsource_bugtraq
https://seclists.org/bugtraq/2019/May/16
Mailing List mailing-list x_refsource_mlist
https://lists.debian.org/debian-lts-announce/2019/05/msg00012.html
Third Party Advisory vendor-advisory x_refsource_gentoo
https://security.gentoo.org/glsa/202003-14
Vendor Advisory vendor-advisory x_refsource_ubuntu
https://usn.ubuntu.com/4540-1/

Scores

CVSS v3 5.9
EPSS 0.0210
EPSS Percentile 79.4%
Attack Vector NETWORK
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-476
Status published
Products (1)
atftp_project/atftp 0.7.1
Published Apr 20, 2019
Tracked Since Feb 18, 2026