CVE-2018-1330 in Mesos
Summary
by MITRE
When parsing a malformed JSON payload, libprocess in Apache Mesos versions 1.4.0 to 1.5.0 might crash due to an uncaught exception. Parsing chunked HTTP requests with trailers can lead to a libprocess crash too because of the mistakenly planted assertion. A malicious actor can therefore cause a denial of service of Mesos masters rendering the Mesos-controlled cluster inoperable.
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Analysis
by VulDB Data Team • 03/23/2020
The vulnerability identified as CVE-2018-1330 represents a critical denial of service weakness within Apache Mesos distributed computing framework. This issue affects versions 1.4.0 through 1.5.0 where the libprocess component fails to properly handle malformed JSON payloads during processing. The flaw manifests when the system encounters improperly formatted data structures that trigger unhandled exceptions within the core processing logic. The vulnerability specifically impacts the HTTP request parsing mechanism, particularly when dealing with chunked requests that include trailing headers. When such malformed data reaches the libprocess layer, it causes the system to crash due to an assertion failure that was not properly anticipated during the development lifecycle.
The technical implementation of this vulnerability stems from inadequate error handling within the JSON parsing routines of the libprocess library. When processing HTTP requests with trailers, the system attempts to parse additional header information that follows the main request body. The assertion mechanism designed to validate data integrity becomes ineffective when confronted with malformed JSON structures, leading to abrupt termination of the process. This behavior aligns with CWE-472, which addresses external control of system or resource state, as the malformed input directly influences the internal state management of the processing component. The vulnerability operates at the application layer of the network stack and specifically targets the HTTP parsing functionality that is fundamental to Mesos master operations.
The operational impact of this vulnerability extends beyond simple system crashes to create complete service disruption within Mesos clusters. When a malicious actor successfully triggers this vulnerability through crafted JSON payloads, the Mesos master nodes become unresponsive and cease to function properly. This renders the entire cluster inoperable as the master nodes are responsible for coordinating and managing the distributed workload across the cluster. The denial of service condition affects all cluster operations including task scheduling, resource allocation, and monitoring functions. The vulnerability can be exploited remotely without authentication requirements, making it particularly dangerous in production environments where cluster availability is critical. According to ATT&CK framework technique T1499.004, this represents a specific form of network denial of service that targets infrastructure components.
Mitigation strategies for CVE-2018-1330 focus primarily on upgrading to patched versions of Apache Mesos where the vulnerability has been addressed through improved error handling mechanisms. Organizations should immediately upgrade to versions 1.5.1 or later where the JSON parsing routines have been enhanced to properly handle malformed inputs without causing system crashes. Additionally, implementing network-level controls such as rate limiting and input validation at the perimeter can provide additional protection against exploitation attempts. The fix typically involves adding proper exception handling around the JSON parsing functions and ensuring that assertion failures do not result in process termination. Security monitoring should also be enhanced to detect unusual patterns of HTTP request processing that might indicate exploitation attempts, particularly around chunked requests with trailers. Organizations should also consider implementing redundant master nodes to provide failover capabilities and reduce the impact of potential exploitation attempts.