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Vulnerability · Published Aug 30, 2022 · Assigned by mitre

CVE-2022-39028

High 7.5

In plain English

A high-severity security flaw in the inetutils package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 2.3% (higher than 84% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.5High
Exploit odds (30 days)2.3%top 16.2% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12inetutils2:2.3-5DEBIAN-CVE-2022-39028
Debian:13inetutils2:2.3-5DEBIAN-CVE-2022-39028
Debian:14inetutils2:2.3-5DEBIAN-CVE-2022-39028
Ubuntu:22.04:LTSinetutils2:2.2-2ubuntu0.1USN-6304-1
Ubuntu:22.04:LTSinetutils2:2.2-2ubuntu0.1UBUNTU-CVE-2022-39028

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References