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CVE-2020-6097

An exploitable denial of service vulnerability exists in the atftpd daemon functionality of atftp...

7.5 HighFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
None
Availability
High

Exploit likelihood

2.15%Up 1.4 points since Apr 14, 2021
90%50%10%1%

What each source reports

CVE List Score used 7.5

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.

Record
CVE-2020-6097
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-617
Updated
2026-11-02
EUVDEUVD-2020-27251 7.5

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.

Record
EUVD-2020-27251
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-03
GitHub AdvisoriesGHSA-g854-fc3p-gq33 7.5

An exploitable denial of service vulnerability exists in the atftpd daemon functionality of atftp...

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.

Record
GHSA-g854-fc3p-gq33
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness
CWE-617
Updated
2026-11-02
NVD 7.5

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.

Record
CVE-2020-6097
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0
5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness
CWE-617
Updated
2026-11-02
OSV 7.5

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.

Record
CVE-2020-6097
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVDEBIAN-CVE-2020-6097 7.5

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.

Record
DEBIAN-CVE-2020-6097
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
Show 4 moreShow less
OSVUBUNTU-CVE-2020-6097 7.5

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.

Record
UBUNTU-CVE-2020-6097
CVSS 3.1
7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 3.0
7.5 HighCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated
2026-11-02
OSVopenSUSE-SU-2020:1736-1 No score

Security update for atftp

This update for atftp fixes the following issues:

  • [boo#1176437, CVE-2020-6097] A specially crafted sequence of RRQ-Multicast requests can trigger an assert() call resulting denial-of-service.
Record
openSUSE-SU-2020:1736-1
Updated
2026-11-02
OSVopenSUSE-SU-2024:10636-1 No score

atftp-0.7.5-1.1 on GA media

These are all security issues fixed in the atftp-0.7.5-1.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2024:10636-1
Updated
2026-11-02
OSVUSN-6334-1 No score

atftp vulnerabilities

Peter Wang discovered that atftp did not properly manage certain inputs. A remote attacker could send a specially crafted tftp request to the server to cause a crash. (CVE-2020-6097)

Andreas B. Mundt discovered that atftp did not properly manage certain inputs. A remote attacker could send a specially crafted tftp request to the server to cause a crash. (CVE-2021-41054)

Johannes Krupp discovered that atftp did not properly manage certain inputs. A remote attacker could send a specially crafted tftp request to the server and make the server to disclose /etc/group data. (CVE-2021-46671)

Record
USN-6334-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
atftp
Debian:12
 before 0.7.git20120829-3.2
0.7.git20120829-3.2
atftp
Debian:13
 before 0.7.git20120829-3.2
0.7.git20120829-3.2
atftp
Debian:14
 before 0.7.git20120829-3.2
0.7.git20120829-3.2
atftp
Debian:9
From an advisory covering 2 CVEs
 before 0.7.git20120829-3.1~deb9u2, plus listed versions
0.7.git20120829-30.7.git20120829-3.1~deb9u1
0.7.git20120829-3.1~deb9u2
atftp
Ubuntu:Pro:16.04:LTS
 before 0.7.git20120829-3.1~0.16.04.1+esm1, plus listed versions
0.7.git20120829-2.10.7.git20120829-3.1~0.16.04.1
0.7.git20120829-3.1~0.16.04.1+esm1
atftp
Ubuntu:Pro:18.04:LTS
 before 0.7.git20120829-3.1~0.18.04.1+esm1, plus listed versions
0.7.git20120829-30.7.git20120829-3.1~0.18.04.1
0.7.git20120829-3.1~0.18.04.1+esm1
atftp
Ubuntu:20.04:LTS
 before 0.7.git20120829-3.1ubuntu0.1, plus listed versions
0.7.git20120829-3.1
0.7.git20120829-3.1ubuntu0.1
atftp
Ubuntu:Pro:16.04:LTS
From an advisory covering 3 CVEs
 before 0.7.git20120829-3.1~0.16.04.1+esm1, plus listed versions
0.7.git20120829-2.10.7.git20120829-3.1~0.16.04.1
0.7.git20120829-3.1~0.16.04.1+esm1
atftp
Ubuntu:Pro:18.04:LTS
From an advisory covering 3 CVEs
 before 0.7.git20120829-3.1~0.18.04.1+esm1, plus listed versions
0.7.git20120829-30.7.git20120829-3.1~0.18.04.1
0.7.git20120829-3.1~0.18.04.1+esm1
atftp
Ubuntu:20.04:LTS
From an advisory covering 3 CVEs
 before 0.7.git20120829-3.1ubuntu0.1, plus listed versions
0.7.git20120829-3.1
0.7.git20120829-3.1ubuntu0.1
atftp
openSUSE:Leap 15.2
 before 0.7.2-lp152.2.3.1
0.7.2-lp152.2.3.1
atftp
openSUSE:Tumbleweed
From an advisory covering 3 CVEs
 before 0.7.5-1.1
0.7.5-1.1

History

History
RecordedChangedSources
affected, facts
aliasesEUVD
first indexedCVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2020-6097 is a high vulnerability (CVSS 7.5) in Atftp Project Atftp, published September 10, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 2.15%, the 82nd percentile. Fixed in atftp 0.7.git20120829-3.2.

References

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