CVE-2019-11366

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.

CVSS v3.0 5.9 MEDIUM
CVSS v2.0 4.3 MEDIUM

5.9^/10

CVSS v3.0 : MEDIUM

Vector : AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitability : 2.2 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

4.3^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:M/Au:N/C:N/I:N/A:P

Exploitability : 8.6 / Impact : 2.9

Access Vector NETWORK

Access Complexity MEDIUM

Authentication NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://sourceforge.net/p/atftp/code/ci/382f76a90b44f81fec00e2f609a94def4a5d3580/	Patch Third Party Advisory
https://pulsesecurity.co.nz/advisories/atftpd-multiple-vulnerabilities	Exploit Third Party Advisory
https://www.debian.org/security/2019/dsa-4438
https://seclists.org/bugtraq/2019/May/16
https://lists.debian.org/debian-lts-announce/2019/05/msg00012.html
https://security.gentoo.org/glsa/202003-14
https://usn.ubuntu.com/4540-1/

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Configurations

Configuration 1 (hide)

cpe:2.3:a:atftp_project:atftp:0.7.1:*:*:*:*:*:*:*

Information

Published : 2019-04-20 06:29

Updated : 2020-09-28 11:15

NVD link : CVE-2019-11366

Mitre link : CVE-2019-11366

JSON object : View

CWE

CWE-476

NULL Pointer Dereference

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Products Affected

atftp_project

atftp

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