Vulnerability Details CVE-2022-39028
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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 50.2%
CVSS Severity
CVSS v3 Score 7.5
References
- https://git.hadrons.org/cgit/debian/pkgs/inetutils.git/commit/?id=113da8021710d871c7dd72d2a4d5615d42d64289
- https://lists.debian.org/debian-lts-announce/2022/11/msg00033.html
- https://lists.gnu.org/archive/html/bug-inetutils/2022-08/msg00002.html
- https://pierrekim.github.io/blog/2022-08-24-2-byte-dos-freebsd-netbsd-telnetd-netkit-telnetd-inetutils-telnetd-kerberos-telnetd.html
- https://git.hadrons.org/cgit/debian/pkgs/inetutils.git/commit/?id=113da8021710d871c7dd72d2a4d5615d42d64289
- https://lists.debian.org/debian-lts-announce/2022/11/msg00033.html
- https://lists.gnu.org/archive/html/bug-inetutils/2022-08/msg00002.html
- https://pierrekim.github.io/blog/2022-08-24-2-byte-dos-freebsd-netbsd-telnetd-netkit-telnetd-inetutils-telnetd-kerberos-telnetd.html
Products affected by CVE-2022-39028
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cpe:2.3:a:gnu:inetutils:-
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cpe:2.3:a:gnu:inetutils:1.3.2
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cpe:2.3:a:gnu:inetutils:1.3a
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cpe:2.3:a:gnu:inetutils:1.3b
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cpe:2.3:a:gnu:inetutils:1.4.0
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cpe:2.3:a:gnu:inetutils:1.4.1
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cpe:2.3:a:gnu:inetutils:1.4.2
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cpe:2.3:a:gnu:inetutils:1.5
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cpe:2.3:a:gnu:inetutils:1.6
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cpe:2.3:a:gnu:inetutils:1.7
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cpe:2.3:a:gnu:inetutils:1.8
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cpe:2.3:a:gnu:inetutils:1.9
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cpe:2.3:a:gnu:inetutils:1.9.1
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cpe:2.3:a:gnu:inetutils:1.9.2
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cpe:2.3:a:gnu:inetutils:1.9.3
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cpe:2.3:a:gnu:inetutils:1.9.4
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cpe:2.3:a:gnu:inetutils:2.2
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cpe:2.3:a:gnu:inetutils:2.3
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cpe:2.3:a:mit:kerberos_5:-
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cpe:2.3:a:mit:kerberos_5:1.0
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cpe:2.3:a:mit:kerberos_5:1.0.3
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cpe:2.3:a:netkit-telnet_project:netkit-telnet:*
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cpe:2.3:o:debian:debian_linux:10.0