Description
An exploitable denial of service vulnerability exists in the atftpd daemon functionality of atftp 0.7.git20120829-3.1+b1. A specially crafted sequence of RRQ-Multicast requests trigger an assert() call resulting in denial-of-service. An attacker can send a sequence of malicious packets to trigger this vulnerability.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| — | atftpd | atftp 0.7.git20120829-3.1+b1 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | atftp | 0.7.git20120829-3.2 | — |
| Debian 13 | atftp | 0.7.git20120829-3.2 | — |
| Debian 12 | atftp | 0.7.git20120829-3.2 | — |
| Debian 9 | atftp | 0.7.git20120829-3.1~deb9u2 | DLA-2820-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | atftp | 0.7.git20120829-3.1ubuntu0.1 | USN-6334-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 18.04 LTS | atftp | 0.7.git20120829-3.1~0.18.04.1+esm1 | USN-6334-1 |
| Ubuntu Pro 16.04 LTS | atftp | 0.7.git20120829-3.1~0.16.04.1+esm1 | USN-6334-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | atftp | 0.7.5-1.1 | openSUSE-SU-2024:10636-1 |
| openSUSE Leap 15.2 | atftp | 0.7.2-lp152.2.3.1 | openSUSE-SU-2020:1736-1 |
Advisories 4
- USN-6334-1 atftp vulnerabilities Ubuntu Security Notices (USN) · Jun 25, 2026
- DLA-2820-1 atftp - security update Debian Security (DSA / DLA) · Mar 9, 2026
- openSUSE-SU-2020:1736-1 Security update for atftp SUSE / openSUSE Security Updates · Feb 4, 2026
- openSUSE-SU-2024:10636-1 atftp-0.7.5-1.1 on GA media SUSE / openSUSE Security Updates · Feb 4, 2026