Issued:

2022-01-18

Updated:

2022-01-18

RHSA-2022:0158 - Important: telnet security update

Synopsis

Important: telnet security update

Type/Severity

Security Advisory Important

Topic

An update for telnet is now available for Red Hat Enterprise Linux 7.7 Advanced Update Support, Red Hat Enterprise Linux 7.7 Telco Extended Update Support, and Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

Telnet is a popular protocol for logging in to remote systems over the Internet. The telnet-server packages include a telnet service that supports remote logins into the host machine. The telnet service is disabled by default.

Security Fix(es):

• telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code (CVE-2020-10188)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

Updated Packages

• telnet-debuginfo-0.17-65.el7_7.ppc64le.rpm
• telnet-0.17-65.el7_7.ppc64le.rpm
• telnet-debuginfo-0.17-65.el7_7.x86_64.rpm
• telnet-server-0.17-65.el7_7.ppc64le.rpm
• telnet-server-0.17-65.el7_7.x86_64.rpm
• telnet-0.17-65.el7_7.src.rpm
• telnet-0.17-65.el7_7.x86_64.rpm

Fixes

• This content is not included.BZ - 1811673

CVEs

• CVE-2020-10188

References

• https://access.redhat.com/security/updates/classification/#important

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.