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

Vulnerability identifier: #VU80394

CSH Severity: Medium

CVSS v4: 6.9 [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]

CVE-ID: CVE-2021-46671

CWE-ID: CWE-125

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

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

Install updates 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 0.7.0-160.14.1
atftp-debuginfo - update to 0.7.0-160.14.1
atftp-debugsource - update to 0.7.0-160.14.1

• https://sourceforge.net/p/atftp/code/ci/9cf799c40738722001552618518279e9f0ef62e5
• https://bugs.debian.org/1004974
• https://lists.debian.org/debian-lts-announce/2022/05/msg00040.html

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