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AUSCERT External Security Bulletin Redistribution
ESB-2023.5028
USN-6334-1: atftp vulnerabilities
5 September 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: atftp
Publisher: Ubuntu
Operating System: Ubuntu
Resolution: Patch/Upgrade
CVE Names: CVE-2021-46671 CVE-2021-41054 CVE-2020-6097
Original Bulletin:
https://ubuntu.com/security/notices/USN-6334-1
Comment: CVSS (Max): 7.5 CVE-2021-41054 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
CVSS Source: NIST
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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USN-6334-1: atftp vulnerabilities
4 September 2023
Several security issues were fixed in atftp.
Releases
o Ubuntu 20.04 LTS
o Ubuntu 18.04 ESM
o Ubuntu 16.04 ESM
Packages
o atftp - Advanced TFTP Server and Client
Details
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 )
Update instructions
The problem can be corrected by updating your system to the following package
versions:
Ubuntu 20.04
o atftpd - 0.7.git20120829-3.1ubuntu0.1
Ubuntu 18.04
o atftpd - 0.7.git20120829-3.1~0.18.04.1+esm1
Available with Ubuntu Pro
Ubuntu 16.04
o atftpd - 0.7.git20120829-3.1~0.16.04.1+esm1
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References
o CVE-2020-6097
o CVE-2021-46671
o CVE-2021-41054
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