An IT security alert update for a known vulnerability has been released for Red Hat Enterprise Linux (shim). You can find out how affected users should behave here.
The Federal Office for Security in Information Technology (BSI) released an update on May 2nd, 2024 to a security hole with several vulnerabilities for Red Hat Enterprise Linux (shim) that became known on April 16th, 2024. The security vulnerability affects the Linux operating system as well as the products Red Hat Enterprise Linux Server EUS, SUSE Linux and Oracle Linux.
The latest manufacturer recommendations regarding updates, workarounds and security patches for this vulnerability can be found here: Oracle Linux Security Advisory ELSA-2024-1959 (As of: May 3, 2024). Other useful resources are listed later in this article.
Multiple vulnerabilities for Red Hat Enterprise Linux (shim) – Risk: High
Risk level: 5 (high)
CVSS Base Score: 8,3
CVSS Temporal Score: 7,2
Remoteangriff: Ja
The Common Vulnerability Scoring System (CVSS) is used to assess the severity of vulnerabilities in computer systems. The CVSS standard makes it possible to compare potential or actual security vulnerabilities based on various metrics in order to create a priority list for taking countermeasures. The attributes “none”, “low”, “medium”, “high” and “critical” are used to determine the severity levels of a vulnerability. The Base Score evaluates the requirements for an attack (including authentication, complexity, privileges, user interaction) and its consequences. With the temporal score, framework conditions that can change over time are taken into account in the evaluation. The risk of the vulnerability discussed here is classified as “high” according to the CVSS with a base score of 8.3.
Red Hat Enterprise Linux (shim) Bug: Description of the attack
Red Hat Enterprise Linux (RHEL) is a popular Linux distribution.
A local attacker could exploit multiple vulnerabilities in Red Hat Enterprise Linux in “shim” to cause a denial of service, disclose sensitive information, or execute arbitrary code.
The vulnerability is identified with the individual CVE (Common Vulnerabilities and Exposures) serial numbers. CVE-2023-40546, CVE-2023-40548, CVE-2023-40549, CVE-2023-40547, CVE-2023-40550 und CVE-2023-40551 traded.
Systems affected by the security gap at a glance
operating system
Linux
Products
Red Hat Enterprise Linux (cpe:/o:redhat:enterprise_linux)
SUSE Linux (cpe:/o:suse:suse_linux)
Oracle Linux (cpe:/o:oracle:linux)
Red Hat Enterprise Linux 8.2 (cpe:/o:redhat:enterprise_linux)
Red Hat Enterprise Linux 9 (cpe:/o:redhat:enterprise_linux)
General recommendations for dealing with IT security gaps
Users of the affected systems should keep them up to date. When security gaps become known, manufacturers are required to fix them as quickly as possible by developing a patch or a workaround. If new security updates become available, install them promptly. For information, consult the sources listed in the next section. These often contain further information about the latest version of the software in question as well as the availability of security patches or information about workarounds. If you have any further questions or uncertainties, please contact your responsible administrator. IT security managers should regularly check the sources mentioned to see whether a new security update is available.
Manufacturer information on updates, patches and workarounds
Here you will find further links with information about bug reports, security fixes and workarounds.
Oracle Linux Security Advisory ELSA-2024-1959 vom 2024-05-03 (02.05.2024)
For more information, see:
Red Hat Security Advisory RHSA-2024:2086 vom 2024-04-29 (28.04.2024)
For more information, see:
Oracle Linux Security Advisory ELSA-2024-1902 vom 2024-04-26 (25.04.2024)
For more information, see:
Oracle Linux Security Advisory ELSA-2024-1903 vom 2024-04-24 (24.04.2024)
For more information, see:
Red Hat Security Advisory RHSA-2024:1959 vom 2024-04-23 (22.04.2024)
For more information, see:
SUSE Security Update SUSE-SU-2024:1368-1 vom 2024-04-22 (22.04.2024)
For more information, see:
Red Hat Security Advisory RHSA-2024:1902 vom 2024-04-18 (17.04.2024)
For more information, see:
Red Hat Security Advisory RHSA-2024:1903 vom 2024-04-18 (17.04.2024)
For more information, see:
Red Hat Security Advisory RHSA-2024:1876 vom 2024-04-18 (17.04.2024)
For more information, see:
Red Hat Security Advisory RHSA-2024:1883 vom 2024-04-18 (17.04.2024)
For more information, see:
Red Hat Security Advisory RHSA-2024:1873 vom 2024-04-18 (17.04.2024)
For more information, see:
Red Hat Security Advisory vom 2024-04-16 (16.04.2024)
For more information, see:
Red Hat Security Advisory vom 2024-04-16 (16.04.2024)
For more information, see:
Version history of this security alert
This is the 7th version of this IT security advisory for Red Hat Enterprise Linux (shim). If further updates are announced, this text will be updated. You can see the changes made using the version history below.
April 16, 2024 – Initial version
April 17, 2024 – New updates from Red Hat added
April 22, 2024 – New updates from SUSE and Red Hat added
April 24, 2024 – New updates to Oracle Linux added
April 25, 2024 – New updates to Oracle Linux added
April 28, 2024 – New updates from Red Hat added
May 2, 2024 – New updates to Oracle Linux added
+++ Editorial note: This text was generated based on current BSI data and will be updated in a data-driven manner depending on the warning situation. We accept feedback and comments at [email protected]. +++
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