CVE-2019-11366: Null Pointer Dereference
First published: Sat Apr 20 2019(Updated: )
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.
Credit: cve@mitre.org cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Atftp Project Atftp | =0.7.1 | |
| debian/atftp | 0.7.git20120829-3.3+deb11u2 0.8.0-3 0.8.0-5 |
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Reference Links
- 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/382f76a90b44f81fec00e2f609a94def4a5d3580/
- https://usn.ubuntu.com/4540-1/
- https://www.debian.org/security/2019/dsa-4438
- https://launchpad.net/bugs/cve/CVE-2019-11366
- https://security-tracker.debian.org/tracker/CVE-2019-11366
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-11366
- https://nvd.nist.gov/vuln/detail/CVE-2019-11366
- https://ubuntu.com/security/CVE-2019-11366
Frequently Asked Questions
What is CVE-2019-11366?
CVE-2019-11366 is a vulnerability discovered in atftpd in atftp 0.7.1 that allows for a denial of service attack due to a NULL pointer dereference.
What is the severity of CVE-2019-11366?
CVE-2019-11366 has a severity score of 5.9, which is considered medium.
How does CVE-2019-11366 affect the atftp package?
CVE-2019-11366 affects atftp versions 0.7.git20120829-3.2~deb10u3, 0.7.git20120829-3.3+deb11u2, and 0.8.0-3.
How can CVE-2019-11366 be fixed on Debian and Ubuntu systems?
Debian users should update to version 0.7.git20120829-3.2~deb10u3 or 0.7.git20120829-3.3+deb11u2, while Ubuntu users should update to version 0.7.20120829-3.1~0.18.04.1 for Bionic Beaver or 0.7.20120829-3.1~0.16.04.1 for Xenial Xerus.
What is the CWE ID for CVE-2019-11366?
CVE-2019-11366 is associated with CWE ID 476.
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