Plattform
cisco
Komponente
cisco-aci-multi-site-orchestrator
CVE-2021-1388 describes an authentication bypass vulnerability within the Cisco ACI Multi-Site Orchestrator (MSO). This flaw allows an unauthenticated, remote attacker to circumvent authentication mechanisms and potentially gain administrator-level access to the system. The vulnerability impacts versions prior to a patch release, and successful exploitation could lead to significant compromise of the network infrastructure. Cisco has acknowledged the vulnerability and recommends upgrading to a fixed version.
The impact of CVE-2021-1388 is severe. An attacker exploiting this vulnerability can bypass authentication and obtain a token granting administrator-level privileges. With this token, they can authenticate to the API and manage the Cisco Application Policy Infrastructure Controller (APIC). This could allow an attacker to modify network configurations, steal sensitive data, disrupt services, or even gain complete control over the affected ACI environment. The ability to bypass authentication without any prior credentials makes this vulnerability particularly dangerous, as it requires minimal effort to exploit. This vulnerability shares similarities with other API authentication bypasses where improper token validation is the root cause.
CVE-2021-1388 was publicly disclosed on February 24, 2021. While no public proof-of-concept (PoC) code has been widely released, the vulnerability's severity and ease of exploitation suggest a high probability of exploitation. The vulnerability is not currently listed on CISA's KEV catalog, but its critical severity warrants close monitoring. Active campaigns targeting Cisco devices are common, so organizations should prioritize patching.
Organizations heavily reliant on Cisco ACI Multi-Site Orchestrator for network automation and management are at significant risk. Specifically, environments with exposed API endpoints or those lacking robust access controls are particularly vulnerable. Shared hosting environments utilizing ACI MSO could also be affected, as a compromised tenant could potentially exploit this vulnerability to gain access to other tenants' resources.
• linux / server: Monitor system logs (journalctl) for unusual API requests or authentication attempts. Look for patterns indicative of token manipulation.
journalctl -u aci-ms-orchestrator -f | grep -i "authentication bypass"• cisco: Use Cisco's security monitoring tools to detect unauthorized API access attempts. Review Cisco Security Advisories for specific detection signatures. • generic web: Monitor network traffic for requests to the vulnerable API endpoint. Use intrusion detection systems (IDS) to identify suspicious patterns. • generic web: Check access logs for unusual user agent strings or IP addresses attempting to access the API endpoint.
disclosure
Exploit-Status
EPSS
1.96% (83% Perzentil)
CVSS-Vektor
The primary mitigation for CVE-2021-1388 is to upgrade to a patched version of Cisco ACI Multi-Site Orchestrator as soon as it becomes available. Since a fixed version is not specified, consult Cisco's security advisory for the latest recommended version. In the interim, consider implementing stricter network segmentation to limit the potential blast radius of a successful attack. Review and harden API access controls, ensuring that all API requests are properly authenticated and authorized. Monitor API logs for suspicious activity, such as unusual authentication attempts or requests from unexpected sources. While a WAF might offer some protection, it's unlikely to be sufficient without a patch.
Aktualisieren Sie die Cisco ACI Multi-Site Orchestrator-Software auf eine nicht anfällige Version. Weitere Details und spezifische Update-Anweisungen finden Sie im Cisco Advisory.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2021-1388 is a critical vulnerability allowing unauthenticated attackers to bypass authentication in Cisco ACI Multi-Site Orchestrator, potentially gaining administrator access. It's due to improper token validation in a specific API endpoint, leading to privilege escalation.
You are affected if you are running a version of Cisco ACI Multi-Site Orchestrator prior to the release of a fix. Check Cisco's advisory for the specific affected versions and upgrade as soon as possible.
The primary fix is to upgrade to a patched version of Cisco ACI Multi-Site Orchestrator. Until the upgrade, restrict API access and monitor for suspicious activity as temporary mitigations.
While no confirmed active exploitation campaigns are publicly known, the vulnerability's critical severity and ease of exploitation make it a high-priority target, and exploitation is likely.
Refer to the official Cisco Security Advisory for CVE-2021-1388 on the Cisco website. Search for 'CVE-2021-1388 Cisco' to locate the advisory.
Lade deine Abhängigkeitsdatei hoch und erfahre sofort, ob dich diese und andere CVEs treffen.