#VU46106 Reachable Assertion in atftp - CVE-2020-6097

Vulnerability identifier: #VU46106

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-2020-6097

CWE-ID: CWE-617

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 reachable assertion in the atftpd daemon functionality. A remote attacker can use a specially crafted sequence of RRQ-Multicast requests to trigger an assert() call and cause a denial of service conditon on the target system.

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://www.talosintelligence.com/vulnerability_reports/TALOS-2020-1029

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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.