CVE-2024-56615
Linux
CVE-2024-56615 addresses an out-of-bounds write vulnerability in the Linux kernel's BPF (Berkeley Packet Filter) subsystem, specifically affecting devmap. This flaw arises during element deletion, where a signed integer used for accessing map entries can lead to writing beyond allocated memory boundaries. When the map is released via dev_map_free(), the iterator variable, also a signed integer, can cause similar out-of-bounds accesses. While the CVSS score is 7.8 (High), the SOCRadar Vulnerability Risk Score (SVRS) is 75, indicating a serious level of risk, and close to critical, due to reported exploits in the wild. Exploitation could lead to kernel crashes (as demonstrated by the provided splat) or potentially arbitrary code execution, making timely patching critical. Update your Linux kernel to the latest stable version to mitigate this critical security flaw.
Description
CVE-2024-56615 is a vulnerability affecting the Linux kernel's BPF (Berkeley Packet Filter) functionality. This vulnerability stems from an out-of-bounds (OOB) write issue within the dev_map_free() function. When deleting elements from the devmap, the index used to access map entries can potentially exceed the valid range due to being a signed integer. This leads to unintended writes outside the designated memory area, potentially causing a system crash or allowing attackers to gain control over the system.
The SVRS (SOCRadar Vulnerability Risk Score) for CVE-2024-56615 is 70, which signifies a high severity vulnerability. This score indicates the vulnerability's potential for exploitation and impact.
Key Insights
- Exploitation: CVE-2024-56615 is classified as "In The Wild," meaning malicious actors are actively exploiting this vulnerability. This underscores the urgency to address it.
- Impact: Exploitation of this vulnerability could lead to system crashes, denial-of-service attacks, and potentially even remote code execution, allowing attackers to gain control of the compromised system.
- System-Wide Vulnerability: The vulnerability affects the Linux kernel, meaning any system running a vulnerable version of the kernel is at risk.
- Limited Mitigation: While the initial fix involved changing data types to prevent the OOB writes, it might require system-level updates and reboots.
Mitigation Strategies
- Immediate Patching: Implement the official patch released by the Linux kernel developers. This involves updating the kernel to the latest version or applying the necessary security patches.
- System-wide Updates: Regularly scan and update all systems running vulnerable versions of the Linux kernel to ensure all systems are patched.
- Network Segmentation: Implement network segmentation to isolate potentially vulnerable systems, limiting the impact if an exploit is successful.
- Threat Intelligence: Utilize threat intelligence resources from organizations like SOCRadar to stay informed about new exploits and attack vectors related to CVE-2024-56615.
Additional Information: If you have further inquiries regarding this vulnerability, please use the "Ask to Analyst" feature on SOCRadar, contact SOCRadar directly, or open a support ticket for more information.
Indicators of Compromise
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Affected Software
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CWE Details
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