CVE-2022-39028: Null Pointer Dereference
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.
Affected Software
Remediation
Event History
Frequently Asked Questions
What is CVE-2022-39028?
CVE-2022-39028 is a vulnerability in telnetd in GNU Inetutils through 2.3, MIT krb5-appl through 1.0.3, and derivative works.
What is the severity of CVE-2022-39028?
The severity of CVE-2022-39028 is high with a CVSS score of 7.5.
How does CVE-2022-39028 affect GNU Inetutils?
CVE-2022-39028 affects GNU Inetutils through version 2.3.
How does CVE-2022-39028 affect MIT krb5-appl?
CVE-2022-39028 affects MIT krb5-appl through version 1.0.3.
How can I fix CVE-2022-39028?
To fix CVE-2022-39028, it is recommended to update to the latest version of GNU Inetutils and MIT krb5-appl.