CVE-2019-11365
Publication date 20 April 2019
Last updated 25 August 2025
Ubuntu priority
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.
From the Ubuntu Security Team
It was discovered that atftp's FTP server did not properly handler certain input. An attacker could use this to to cause a denial of service (crash) or possibly execute arbitrary code.
Status
| Package | Ubuntu Release | Status |
|---|---|---|
| atftp | ||
| 20.04 LTS focal |
Not affected
|
|
| 18.04 LTS bionic |
Fixed 0.7.git20120829-3.1~0.18.04.1
|
|
| 16.04 LTS xenial |
Fixed 0.7.git20120829-3.1~0.16.04.1
|
|
| 14.04 LTS trusty | Not in release |
Severity score breakdown
| Parameter | Value |
|---|---|
| Base score |
9.8 · Critical
|
| Attack vector | Network |
| Attack complexity | Low |
| Privileges required | None |
| User interaction | None |
| Scope | Unchanged |
| Confidentiality | High |
| Integrity impact | High |
| Availability impact | High |
| Vector | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
References
Related Ubuntu Security Notices (USN)
- USN-4540-1
- atftpd vulnerabilities
- 24 September 2020
- USN-4643-1
- atftp vulnerabilities
- 24 November 2020