ELA-746-1 inetutils security update

missing validation and NULL pointer dereference

Version2:1.9.4-2+deb9u2 (stretch)
Related CVEs CVE-2021-40491 CVE-2022-39028

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


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


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.

For Debian 9 stretch, these problems have been fixed in version 2:1.9.4-2+deb9u2.

We recommend that you upgrade your inetutils packages.

Further information about Extended LTS security advisories can be found in the dedicated section of our website.