An inetutils security update has been released for Debian GNU/Linux 9 Extended LTS to address several security vulnerabilities.

ELA-746-1 inetutils security update

Package : inetutils
Version : 2:1.9.4-2+deb9u2 (stretch)

Related CVEs :
CVE-2021-40491
CVE-2022-39028

Several security vulnerabilities were discovered in inetutils, a
collection of common network programs.

CVE-2021-40491
inetutils' ftp client before 2.2 does not validate addresses
returned by PSV/LSPV responses to make sure they match the server
address. A malicious server can exploit this flaw to reach services
in the client's private network. (This is similar to curl's
CVE-2020-8284.)

CVE-2022-39028
inetutils's telnet server through 2.3 has a NULL pointer dereference
which a client can trigger by sending 0xff 0xf7 or 0xff 0xf8. In a
typical installation, the telnetd application would crash but the
telnet service would remain available through inetd. However, if the
telnetd application has many crashes within a short time interval,
the telnet service would become unavailable after inetd logs a
"telnet/tcp server failing (looping), service terminated" error.

  ELA-746-1 inetutils security update