Severity: MEDIUM
Description: Backup, Recovery, and Media Services (BRMS) for IBM i 7.2, 7.3, and 7.4 contains a local privilege escalation vulnerability. A malicious actor with command line access to the host operating system can elevate privileges to gain component access to the host operating system. IBM X-Force ID: 263583.
CVSS Score: 4.9
D
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1. Risk Assessment
The vulnerability CVE-2023-40377 is a local privilege escalation flaw within IBM’s Backup, Recovery, and Media Services (BRMS) for IBM i versions 7.2, 7.3, and 7.4. This means an attacker who already has command line access to the host operating system can elevate their privileges, gaining component access to the host. The base CVSS score is 4.9 (Medium), indicating a moderate level of risk. The attack complexity is high, meaning the attacker needs some degree of existing access and may need to chain together multiple steps to successfully escalate privileges. The impact on confidentiality, integrity, and availability are all considered low, but not negligible. Business impact could range from unauthorized access to sensitive data stored on the IBM i system, to potential disruptions in backup and recovery processes, affecting business continuity. The EPSS score of 0.000250000 suggests a relatively low probability of exploitation in the wild, but the potential impact warrants attention, especially within organizations heavily reliant on BRMS for critical data protection.
2. Potential Attack Scenarios
An attacker gains command line access to the IBM i host, perhaps through a compromised user account or a vulnerable service. They then exploit the BRMS privilege escalation vulnerability to gain component access. This elevated access allows the attacker to perform actions they normally wouldn’t be able to, such as reading sensitive configuration files, modifying backup schedules to include or exclude critical data, or even potentially impacting the performance of backup and recovery operations. The attacker could leverage this access to steal data, disrupt backups, or use the compromised system as a stepping stone to attack other systems on the network. The high attack complexity implies the attacker needs a good understanding of the BRMS environment and the underlying IBM i operating system to successfully exploit the vulnerability.
3. Mitigation Recommendations
The primary mitigation for CVE-2023-40377 is to apply the patch provided by IBM. IBM recommends updating BRMS to the latest fixed release for your specific IBM i version (7.2, 7.3, or 7.4). The official IBM support page with details on the fix and download links is: https://www.ibm.com/support/pages/node/7048121. In the interim, limit command line access to the IBM i host to trusted users and groups. Implement strong authentication mechanisms, such as multi-factor authentication, where possible. Regularly review user privileges to ensure they align with their required access levels. Monitor system logs for unusual activity, specifically related to BRMS, which could indicate a potential exploitation attempt. Regularly audit the BRMS configuration to identify potential vulnerabilities.
4. Executive Summary
IBM i Backup, Recovery, and Media Services (BRMS) has a vulnerability (CVE-2023-40377) that allows an attacker with existing command line access to gain elevated privileges on the system. While the risk is considered medium, a successful exploit could lead to unauthorized data access, disruption of backup processes, and potential impact to business continuity. The recommended action is to promptly apply the patch provided by IBM, available at https://www.ibm.com/support/pages/node/7048121. Limiting command line access and regularly monitoring system logs are also key steps to mitigate the risk. Addressing this vulnerability is important to protect critical data and ensure the reliability of your backup and recovery infrastructure. Don't delay in patching to reduce your organization's exposure to this threat.
Severity: HIGH
Description: IBM i 7.2, 7.3, and 7.4 could allow a remote attacker to execute arbitrary code leading to a denial of service of network ports on the system, caused by the deserialization of untrusted data. IBM X-Force ID: 287539.
CVSS Score: 7.5
B
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1. Risk Assessment
The vulnerability identified as CVE-2024-31879 is a high-severity issue with a CVSS score of 7.5. It affects IBM i versions 7.2, 7.3, and 7.4 and stems from the deserialization of untrusted data, which could allow a remote attacker to execute arbitrary code. This could lead to a denial of service (DoS) of network ports on the affected system. The attack vector is network-based, requiring no user interaction or privileges, making it relatively easy to exploit. The primary impact is on confidentiality, as the vulnerability could expose sensitive data, but there is no direct impact on integrity or availability. The likelihood of exploitation is moderate, given the low complexity of the attack and the absence of required privileges. The business impact could be significant, particularly for organizations relying on IBM i systems for critical operations, as a successful attack could disrupt services and expose sensitive information.
2. Potential Attack Scenarios
A potential attack scenario involves a remote attacker exploiting the deserialization vulnerability to execute arbitrary code on an IBM i system. The attacker could craft malicious data and send it over the network to the target system. Upon receiving the data, the system deserializes it, triggering the execution of the attacker's code. This could result in the compromise of sensitive data stored on the system or the disruption of network services by causing a denial of service. For example, an attacker could target a financial institution using IBM i systems to process transactions. By exploiting this vulnerability, the attacker could disrupt transaction processing, leading to financial losses and reputational damage for the institution.
3. Mitigation Recommendations
To mitigate this vulnerability, organizations should immediately apply the relevant patches provided by IBM. The patches can be found at the following link: https://www.ibm.com/support/pages/node/7154380. Additionally, organizations should review and restrict network access to IBM i systems, ensuring that only trusted entities can communicate with them. Implementing input validation and sanitization mechanisms can also help prevent the deserialization of untrusted data. Regular monitoring and logging of network activity can aid in the early detection of potential exploitation attempts. For further guidance, refer to IBM's advisory at https://exchange.xforce.ibmcloud.com/vulnerabilities/287539.
4. Executive Summary
CVE-2024-31879 is a high-severity vulnerability affecting IBM i systems versions 7.2, 7.3, and 7.4. It allows remote attackers to execute arbitrary code by exploiting the deserialization of untrusted data, potentially leading to a denial of service and exposure of sensitive information. The vulnerability is relatively easy to exploit, posing a significant risk to organizations relying on these systems for critical operations. Immediate action is required to mitigate this risk, including applying the latest patches from IBM and restricting network access to affected systems. Failure to address this vulnerability could result in service disruptions, financial losses, and reputational damage. Organizations should prioritize this issue to safeguard their operations and data.
Severity: HIGH
Description: IBM System Management for i 7.2, 7.3, and 7.4 could allow a local user to gain elevated privileges due to an unqualified library program call. A malicious actor could cause user-controlled code to run with administrator privilege. IBM X-Force ID: 295227.
CVSS Score: 7
B
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1. Risk Assessment
The vulnerability identified as CVE-2024-38330 is a high-severity issue with a CVSS score of 7. It affects IBM System Management for i versions 7.2, 7.3, and 7.4. The vulnerability arises from an unqualified library program call, which could allow a local user to escalate privileges and execute user-controlled code with administrator-level permissions. This poses significant risks to confidentiality, integrity, and availability, as an attacker could gain full control over the affected system.
The likelihood of exploitation is moderate due to the requirement of local access and user interaction, but the impact is severe if successfully exploited. Attackers could compromise sensitive data, alter system configurations, or disrupt operations. The business impact includes potential data breaches, operational downtime, and reputational damage. Organizations relying on IBM System Management for i should treat this vulnerability as a critical priority.
2. Potential Attack Scenarios
A potential attack scenario involves a malicious insider or an attacker who has gained local access to the system. The attacker could exploit the unqualified library program call by crafting a malicious payload and placing it in a location where the system mistakenly executes it with elevated privileges. For example, the attacker could manipulate the library search path to include a directory under their control, containing a malicious program. When the system attempts to load the library, it executes the attacker's code instead, granting them administrator privileges.
The outcome of such an attack could include unauthorized access to sensitive data, modification or deletion of critical system files, and the installation of persistent backdoors or malware. This could lead to a complete compromise of the system, enabling further lateral movement within the network.
3. Mitigation Recommendations
Immediate action is required to mitigate this vulnerability. Organizations should apply the latest security patches provided by IBM for affected versions of System Management for i. The patch addresses the unqualified library program call and prevents privilege escalation.
Additionally, organizations should implement the principle of least privilege, ensuring that users and processes have only the minimum permissions necessary to perform their tasks. Regular monitoring and auditing of system activity can help detect and respond to suspicious behavior.
For further guidance, refer to IBM's advisory at https://www.ibm.com/support/pages/node/7159615 and the X-Force vulnerability details at https://exchange.xforce.ibmcloud.com/vulnerabilities/295227.
4. Executive Summary
CVE-2024-38330 is a high-severity vulnerability in IBM System Management for i versions 7.2, 7.3, and 7.4. It allows a local user to escalate privileges and execute malicious code with administrator-level permissions, posing significant risks to data confidentiality, system integrity, and operational availability. While exploitation requires local access and user interaction, the potential impact is severe, including data breaches, system compromise, and operational disruption.
To address this vulnerability, organizations must apply the latest patches from IBM and enforce strict access controls. Immediate action is critical to prevent exploitation and safeguard sensitive systems. This vulnerability underscores the importance of proactive vulnerability management and timely patching to protect business-critical infrastructure.