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Red Hat Security Advisory 2020-1342-01

Red Hat Security Advisory 2020-1342-01
Posted Apr 7, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-1342-01 - 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. Issues addressed include a code execution vulnerability.

tags | advisory, remote, code execution, protocol
systems | linux, redhat
advisories | CVE-2020-10188
SHA-256 | 665bf93f9dd8aa1e66f6587c1d4d83d180b081436b8c00cd8e753df4cc96f3ba

Red Hat Security Advisory 2020-1342-01

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====================================================================
Red Hat Security Advisory

Synopsis: Important: telnet security update
Advisory ID: RHSA-2020:1342-01
Product: Red Hat Enterprise Linux
Advisory URL: https://access.redhat.com/errata/RHSA-2020:1342
Issue date: 2020-04-07
CVE Names: CVE-2020-10188
====================================================================
1. Summary:

An update for telnet is now available for Red Hat Enterprise Linux 8.0
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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux AppStream E4S (v. 8.0) - aarch64, ppc64le, s390x, x86_64

3. 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.

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

1811673 - CVE-2020-10188 telnet-server: no bounds checks in nextitem() function allows to remotely execute arbitrary code

6. Package List:

Red Hat Enterprise Linux AppStream E4S (v. 8.0):

Source:
telnet-0.17-73.el8_0.1.src.rpm

aarch64:
telnet-0.17-73.el8_0.1.aarch64.rpm
telnet-debuginfo-0.17-73.el8_0.1.aarch64.rpm
telnet-debugsource-0.17-73.el8_0.1.aarch64.rpm
telnet-server-0.17-73.el8_0.1.aarch64.rpm
telnet-server-debuginfo-0.17-73.el8_0.1.aarch64.rpm

ppc64le:
telnet-0.17-73.el8_0.1.ppc64le.rpm
telnet-debuginfo-0.17-73.el8_0.1.ppc64le.rpm
telnet-debugsource-0.17-73.el8_0.1.ppc64le.rpm
telnet-server-0.17-73.el8_0.1.ppc64le.rpm
telnet-server-debuginfo-0.17-73.el8_0.1.ppc64le.rpm

s390x:
telnet-0.17-73.el8_0.1.s390x.rpm
telnet-debuginfo-0.17-73.el8_0.1.s390x.rpm
telnet-debugsource-0.17-73.el8_0.1.s390x.rpm
telnet-server-0.17-73.el8_0.1.s390x.rpm
telnet-server-debuginfo-0.17-73.el8_0.1.s390x.rpm

x86_64:
telnet-0.17-73.el8_0.1.x86_64.rpm
telnet-debuginfo-0.17-73.el8_0.1.x86_64.rpm
telnet-debugsource-0.17-73.el8_0.1.x86_64.rpm
telnet-server-0.17-73.el8_0.1.x86_64.rpm
telnet-server-debuginfo-0.17-73.el8_0.1.x86_64.rpm

These packages are GPG signed by Red Hat for security. Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2020-10188
https://access.redhat.com/security/updates/classification/#important

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2020 Red Hat, Inc.
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