Buffer overflow in atftp - CVE-2021-41054

Vulnerability identifier: #VU80393

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2021-41054

CWE-ID: CWE-119

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

atftp
SUSE Linux Enterprise Server
Ubuntu
atftpd (Ubuntu package)
atftp
atftp-debuginfo
atftp-debugsource

Install update from vendor's website.

atftp - update to 0.7.5
atftpd (Ubuntu package) - addressed in versions Ubuntu Pro, 0.7.git20120829-3.1ubuntu0.1
atftp - update to 0.7.0-160.11.1
atftp-debuginfo - update to 0.7.0-160.11.1
atftp-debugsource - update to 0.7.0-160.11.1

• 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

• Multiple vulnerabilities in atftpd daemon
• Ubuntu update for atftp
• SUSE update for atftp