#VU80394 Out-of-bounds read in atftp - CVE-2021-46671

Vulnerability identifier: #VU80394

Vulnerability risk: Medium

CVSSv4.0: 2.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-46671

CWE-ID: CWE-125

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 gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in options.c. A remote attacker can create a specially data to the application, trigger an out-of-bounds read error and read contents of memory on the system.

Mitigation
Install updates 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/9cf799c40738722001552618518279e9f0ef62e5
https://bugs.debian.org/1004974
https://lists.debian.org/debian-lts-announce/2022/05/msg00040.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.