On April 12, 2023, a medium-severity vulnerability, CVE-2023-24511, was published affecting Arista's EOS operating system when SNMP is configured. This vulnerability allows a specially crafted packet to cause a memory leak in the SNMP daemon (snmpd), potentially leading to its termination. The impact includes SNMP requests timing out until the snmpd process is automatically restarted, resulting in possible memory resource exhaustion for other processes on the switch.
The CVSS score for this vulnerability is 5.3, which classifies it as medium severity. The attack vector is network-based and requires no privileges or user interaction. Importantly, there are no confidentiality or integrity impacts associated with this vulnerability, but it does present a low availability impact.
Organizations running affected versions of Arista EOS should prioritize remediation. Given the nature of the vulnerability, it is critical to ensure that SNMP is appropriately secured to mitigate potential exploitation.
Currently, there are no known exploits available for this vulnerability, and it has not been marked as actively exploited. However, organizations should remain vigilant and monitor for any changes in the threat landscape.
Organizations should prioritize patching immediately. The vulnerability is present in multiple versions of Arista EOS, specifically those ranging from 4.26.0 up to, but not including, 4.26.10m, 4.27.0 up to 4.27.9m, 4.28.0 up to 4.28.6m, and 4.29.0 up to 4.29.2f.
In summary, CVE-2023-24511 poses a risk to organizations using the affected versions of Arista EOS. Immediate action is required to mitigate potential disruptions to SNMP functionality.
Vulnerability Details
The official description of CVE-2023-24511 states that it allows a specially crafted packet to cause a memory leak in the snmpd process on affected platforms running Arista EOS with SNMP configured. The vulnerability does not have any confidentiality or integrity impacts to the system.
The CVSS score is 5.3, indicating a medium severity level. The CVSS vector includes parameters such as a network attack vector, low attack complexity, no privileges required, and no user interaction necessary. The availability impact is assessed as low.
The affected product is Arista EOS, specifically versions that fall within the specified ranges. The vulnerability was published on April 12, 2023.
Technical Analysis
The root cause of CVE-2023-24511 is a flaw in the processing of SNMP packets. Attackers may exploit this vulnerability by sending specially crafted packets to the affected device over the network.
The attack vector is network-based, which means the attacker does not need to have local access to the device to exploit the vulnerability. The complexity of the attack is low, making it easier for potential attackers to exploit the issue without needing advanced skills.
No privileges are required to exploit the vulnerability, and there is no user interaction necessary. Once exploited, the confidentiality, integrity, and availability impacts vary, with potential availability impact being low.
Risk & Impact Analysis
The real-world risk associated with CVE-2023-24511 is significant, particularly for organizations relying on Arista EOS for network operations. The potential for memory leaks in the SNMP process may lead to service disruptions, impacting network management and monitoring capabilities.
Organizations should take this vulnerability seriously as it could lead to downtime, resource exhaustion, and operational inefficiencies. The urgency of addressing this vulnerability is underscored by its medium CVSS score, indicating that while it may not be the highest risk, it still poses a threat that requires timely action.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The following versions of Arista EOS are affected by CVE-2023-24511: versions 4.26.0 to 4.26.10m, 4.27.0 to 4.27.9m, 4.28.0 to 4.28.6m, and 4.29.0 to 4.29.2f. All other versions are not vulnerable.
Mitigation & Remediation
Organizations should apply the latest patches provided by Arista to remediate CVE-2023-24511. It is crucial to upgrade to versions that are not affected by this vulnerability. If patching is not possible immediately, organizations should consider implementing access controls and monitoring SNMP traffic for any unusual patterns.
For continuous security, organizations can utilize continuous penetration testing to ensure that similar vulnerabilities are identified and mitigated in the future.
Detection Guidance
To monitor for indications of exploitation, organizations should examine logs for unexpected SNMP traffic or repeated SNMP request failures. Additionally, monitoring system performance can help identify potential memory exhaustion issues.
AppSecure Threat Intelligence Insight
CVE-2023-24511 highlights the importance of robust SNMP configuration and awareness of memory management in network devices. Security teams should ensure that devices are not only updated but also configured with best practices to minimize exposure to such vulnerabilities.
Organizations are encouraged to implement a vulnerability management program to systematically assess and address vulnerabilities across all networked systems.
Furthermore, regular training and awareness programs about SNMP security configurations can help mitigate risks associated with similar vulnerabilities.
For further insights on improving security posture, organizations may consider exploring penetration testing methodologies and engaging in security audits to ensure comprehensive coverage against potential threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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