#VU80393 Buffer overflow in atftp - CVE-2021-41054

Vulnerability identifier: #VU80393

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-41054

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
atftp
Web applications / Modules and components for CMS

Vendor: Dennis Kaarsemaker

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a boundary in tftpd_file.c. A remote attacker can send specially crafted data to the server, trigger memory corruption and perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

atftp: 0.7.git20120829-3.1+b1 - 0.7.4

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External links
https://sourceforge.net/p/atftp/code/ci/d255bf90834fb45be52decf9bc0b4fb46c90f205/
https://github.com/nu11secur1ty/CVE-mitre/tree/main/CVE-2021-41054
https://lists.debian.org/debian-lts-announce/2021/11/msg00014.html

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.