Moderate: openssh security update

Sujet

An update for openssh is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Moderate. 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

OpenSSH is an SSH protocol implementation supported by a number of Linux, UNIX, and similar operating systems. It includes the core files necessary for both the OpenSSH client and server.

Security Fix(es):

• ssh: Prefix truncation attack on Binary Packet Protocol (BPP) (CVE-2023-48795)
• openssh: potential command injection via shell metacharacters (CVE-2023-51385)

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

After installing this update, the OpenSSH server daemon (sshd) will be restarted automatically.

Produits concernés

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64

Correctifs

• BZ - 2254210 - CVE-2023-48795 ssh: Prefix truncation attack on Binary Packet Protocol (BPP)
• BZ - 2255271 - CVE-2023-51385 openssh: potential command injection via shell metacharacters

CVE

• CVE-2023-48795
• CVE-2023-51385

Références

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