An issue was discovered in atftpd in atftp 0.7.1.
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.
- Published
- Apr 20, 2019
- Updated
- Jun 16, 2026
- EPSS
- 4.3% · 91th percentile
- CWE
- CWE-787
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Report tools
Action score
40
Plan
Add it to your regular patch cycle.
- CVSS
- 39 / 40 · 9.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 1 / 30 · 4.3%
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for helpAffected systems
| Vendor | Product | CPE |
|---|---|---|
| atftp project | atftp | cpe:2.3:a:atftp_project:atftp |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- atftp project atftp0.7.1
Package-level exposure
OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.
| Ecosystem | Package | Affected range | Fix |
|---|---|---|---|
| Debian:12 | atftp | before 0.7.git20120829-3.1 | 0.7.git20120829-3.1 |
| Debian:8 | atftp | before 0.7.git20120829-1+deb8u1 | 0.7.git20120829-1+deb8u1 |
| Debian:9 | atftp | before 0.7.git20120829-3.1~deb9u1 | 0.7.git20120829-3.1~deb9u1 |
| openSUSE:Tumbleweed | atftp | before 0.7.5-1.1 | 0.7.5-1.1 |
| SUSE:Linux Enterprise Point of Sale 11 SP3 | atftp | before 0.7.0-135.23.3.1 | 0.7.0-135.23.3.1 |
| SUSE:OpenStack Cloud 7 | atftp | before 0.7.0-160.8.1 | 0.7.0-160.8.1 |
Same product
atftp project: all recordsOther highest-scoring records for the same primary product.
- CVE-2021-41054tftpd_file.c in atftp through 0.7.4 has a buffer overflow because buffer-size handling does not properly consider the combination of data, O31Monitor
- CVE-2020-6097An exploitable denial of service vulnerability exists in the atftpd daemon functionality of atftp 0.7.git20120829-3.1+b1.31Monitor
- CVE-2019-11366An issue was discovered in atftpd in atftp 0.7.1.24Monitor
- CVE-2021-46671options.c in atftp before 0.7.5 reads past the end of an array, and consequently discloses server-side /etc/group data to a remote client.21Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
| Product / package | Fixed version | Source |
|---|---|---|
| debian:atftp | 0.7.git20120829-3.1 · Debian:12 | Package registry (OSV) |
| opensuse:atftp | 0.7.5-1.1 · openSUSE:Tumbleweed | Package registry (OSV) |
| suse:atftp | 0.7.0-160.8.1 · SUSE:OpenStack Cloud 7 | Package registry (OSV) |
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
No credits in the CNA record.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
No nightly-computed relations.
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
No known public program.
Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
CWE-787 · Out-of-bounds WriteCVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
nvd-primary
Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
MITRE has no CAPEC/ATT&CK mapping for this CWE.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- lists.debian.org/debian-lts-announce/2019/05/msg00012.html
- seclists.org/bugtraq/2019/May/16
- security.gentoo.org/glsa/202003-14
- sourceforge.net/p/atftp/code/ci/abed7d245d8e8bdfeab24f9f7f55a52c3140f96b/
- usn.ubuntu.com/4540-1/
- www.debian.org/security/2019/dsa-4438
Vendor advisories and official records. Exploit/PoC links are deliberately left out.