telnetd in GNU Inetutils through 2.3, MIT krb5-appl through 1.0.3, and derivative works…
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Will not fix Red Hat: no fix planned
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-476.
Summary
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 4
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:gnu:inetutils:*:*:*:*:*:*:*:* | up to 2.3 | Vulnerable | GNU |
| cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* | up to 1.0.3 | Vulnerable | moos-ivp |
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:a:netkit-telnet_project:netkit-telnet:*:*:*:*:*:*:*:* | up to 0.17 | Vulnerable | Netkit-telnet Project |
- cpe:2.3:a:gnu:inetutils:*:*:*:*:*:*:*:* Versions up to 2.3 Vulnerable ·GNU
- cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:* Versions up to 1.0.3 Vulnerable ·moos-ivp
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:a:netkit-telnet_project:netkit-telnet:*:*:*:*:*:*:*:* Versions up to 0.17 Vulnerable ·Netkit-telnet Project
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
Timeline
- 2026-10-02 Threatist record created from CVE-2022-39028
- 2026-10-03 Alias added: GHSA-jq82-jqvw-64w3
References
Sources
- CVE-2022-39028 · CVE Program
- CVE-2022-39028 · NVD
- FIRST EPSS
- GHSA-jq82-jqvw-64w3 · GitHub Advisory Database · CC BY 4.0
- CVE-2022-39028 · Red Hat security data · CC BY 4.0
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