#vulnerability

**Why is this Red Hat, Inc. CVE included in the Security Update Guide?** The vulnerability assigned to this CVE is in Linux Shim boot. It is being documented in the Security Update Guide to announce that the latest builds of Microsoft Windows address this vulnerability by blocking old, unpatched, Linux boot loaders by applying SBAT (Secure Boot Advanced Targeting) EFI variables in the UEFI library. Please see Security Update Guide Supports CVEs Assigned by Industry Partners for more information. For more information see: CVE-2023-40547.

**The following mitigating factors might be helpful in your situation:** * Users are advised against installing or enabling the Line Printer Daemon (LPD) service. * The LPD is not installed or enabled on the systems by default. * The LPD has been announced as deprecated since Windows Server 2012. Please refer to: Features Removed or Deprecated in Windows Server 2012.

**According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability?** Successful exploitation of this vulnerability requires an attacker to win a race condition.

**According to the CVSS metric, successful exploitation of this vulnerability could lead to some loss of confidentiality (C:L) and integrity (I:L) but does not impact availability (A:N)? What does that mean for this vulnerability?** The attacker is only able to modify the sender's name of Teams message (I:L) and through social engineering, attempt to trick the recipient into disclosing information (C:L). The availability of the product cannot be affected (A:N).

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

**What type of information could be disclosed by this vulnerability?** An attacker who successfully exploited this vulnerability could potentially read small portions of stack memory.

**How could an attacker exploit this vulnerability?** An attacker could exploit this vulnerability by tricking a user into sending a request to a malicious server. This could result in the server returning malicious data that might cause arbitrary code execution on the user's system.

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.

Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors might be helpful in your situation: * Systems are not affected if IPv6 is disabled on the target machine.

**What privileges could be gained by an attacker who successfully exploited this vulnerability?** An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.