{"id":"UBUNTU-CVE-2022-39028","details":"telnetd in GNU Inetutils through 2.3, MIT krb5-appl through 1.0.3, and derivative works has a NULL pointer dereference via 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. NOTE: MIT krb5-appl is not supported upstream but is shipped by a few Linux distributions. The affected code was removed from the supported MIT Kerberos 5 (aka krb5) product many years ago, at version 1.8.","modified":"2026-01-30T02:42:58.314715Z","published":"2022-08-30T05:15:00Z","related":["USN-6304-1","USN-7781-1"],"upstream":["CVE-2022-39028"],"references":[{"type":"REPORT","url":"https://ubuntu.com/security/CVE-2022-39028"},{"type":"REPORT","url":"https://lists.gnu.org/archive/html/bug-inetutils/2022-08/msg00002.html"},{"type":"REPORT","url":"https://pierrekim.github.io/blog/2022-08-24-2-byte-dos-freebsd-netbsd-telnetd-netkit-telnetd-inetutils-telnetd-kerberos-telnetd.html"},{"type":"REPORT","url":"https://git.hadrons.org/cgit/debian/pkgs/inetutils.git/commit/?id=113da8021710d871c7dd72d2a4d5615d42d64289"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-6304-1"},{"type":"REPORT","url":"https://www.cve.org/CVERecord?id=CVE-2022-39028"},{"type":"ADVISORY","url":"https://ubuntu.com/security/notices/USN-7781-1"}],"affected":[{"package":{"name":"inetutils","ecosystem":"Ubuntu:Pro:14.04:LTS","purl":"pkg:deb/ubuntu/inetutils@2:1.9.2-1ubuntu0.1~esm2?arch=source&distro=esm-infra-legacy/trusty"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2:1.9.2-1ubuntu0.1~esm2"}]}],"versions":["2:1.9.1.306-0a482-1","2:1.9.1.363-bbc1-1","2:1.9.2-1","2:1.9.2-1ubuntu0.1~esm1"],"ecosystem_specific":{"availability":"Available 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