CVE-2019-11366

Public Exploit

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.

Category

5.9
CVSS
Severity: Medium
CVSS 3.0 •
CVSS 2.0 •
EPSS 1.36% Top 25%
Vendor Advisory debian.org Vendor Advisory gentoo.org Vendor Advisory ubuntu.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://pulsesecurity.co.nz/advisories/atftpd-multiple-vulnerabilities third party advisory exploit
https://sourceforge.net/p/atftp/code/ci/382f76a90b44f81fec00e2f609a94def4a5d3580/ third party advisory patch
https://www.debian.org/security/2019/dsa-4438 vendor advisory
https://seclists.org/bugtraq/2019/May/16 mailing list
https://lists.debian.org/debian-lts-announce/2019/05/msg00012.html mailing list
https://security.gentoo.org/glsa/202003-14 vendor advisory
https://usn.ubuntu.com/4540-1/ vendor advisory

Frequently Asked Questions

What is the severity of CVE-2019-11366?
CVE-2019-11366 has been scored as a medium severity vulnerability.
How to fix CVE-2019-11366?
To fix CVE-2019-11366, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2019-11366 being actively exploited in the wild?
It is possible that CVE-2019-11366 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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