Cyber Resilience

CVE-2022-39028

HighPublic PoC

Published: 30 August 2022

Published
30 August 2022
Modified
21 November 2024
KEV Added
—
Patch
24 August 2022
CVSS Score v3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score 0.0037 59.2th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2022-39028 is a high-severity NULL Pointer Dereference (CWE-476) vulnerability in Gnu Inetutils. Its CVSS base score is 7.5 (High).

Operationally, ranked in the top 40.8% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability 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…

more

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.

CWE(s)
CWE-476

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

gnu
inetutils
≤ 2.3
mit
kerberos 5
≤ 1.0.3
debian
debian linux
10.0
netkit-telnet project
netkit-telnet
≤ 0.17

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References