CVE-2022-22188 in Junos OS
Summary
by MITRE • 04/14/2022
An Uncontrolled Memory Allocation vulnerability leading to a Heap-based Buffer Overflow in the packet forwarding engine (PFE) of Juniper Networks Junos OS allows a network-based unauthenticated attacker to flood the device with traffic leading to a Denial of Service (DoS). The device must be configured with storm control profiling limiting the number of unknown broadcast, multicast, or unicast traffic to be vulnerable to this issue. This issue affects: Juniper Networks Junos OS on QFX5100/QFX5110/QFX5120/QFX5200/QFX5210/EX4600/EX4650 Series; 20.2 version 20.2R1 and later versions prior to 20.2R2. This issue does not affect: Juniper Networks Junos OS versions prior to 20.2R1.
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Analysis
by VulDB Data Team • 04/20/2022
The vulnerability identified as CVE-2022-22188 represents a critical heap-based buffer overflow within the packet forwarding engine of Juniper Networks Junos OS operating on specific hardware platforms. This issue stems from uncontrolled memory allocation practices that occur when processing network traffic, particularly under conditions where storm control profiling is enabled to limit unknown broadcast, multicast, or unicast traffic. The flaw exists in the PFE component responsible for forwarding packets through the network device, creating a potential pathway for malicious actors to exploit memory management weaknesses in the system's packet processing pipeline.
The technical exploitation of this vulnerability occurs through network-based attacks that flood the affected device with specially crafted traffic patterns designed to trigger the memory allocation flaw. When storm control profiling is configured to limit traffic types, the device's response to excessive traffic creates conditions where memory allocation becomes uncontrolled, leading to heap corruption that manifests as a buffer overflow. This particular implementation vulnerability maps to CWE-122 Uncontrolled Memory Allocation, which specifically addresses situations where applications fail to properly manage memory allocation limits, resulting in potential buffer overflows or memory exhaustion conditions. The attack vector requires no authentication credentials, making it particularly dangerous as any remote network entity can potentially exploit the flaw.
The operational impact of this vulnerability extends beyond simple service disruption to encompass complete device denial of service conditions that can severely impact network infrastructure availability. When successfully exploited, the heap-based buffer overflow causes the affected Juniper devices to crash or become unresponsive, effectively removing them from network operations and creating cascading failures in network connectivity. The specific hardware platforms affected include the QFX5100, QFX5110, QFX5120, QFX5200, QFX5210, EX4600, and EX4650 series devices, all running Junos OS versions 20.2R1 through 20.2R2, making this a widespread concern across enterprise network infrastructure. This vulnerability directly aligns with ATT&CK technique T1498.001 Network Denial of Service, as it enables attackers to compromise system availability through network-based exploitation.
Mitigation strategies for CVE-2022-22188 should prioritize immediate patch deployment for affected Junos OS versions, with administrators implementing the 20.2R2 release or later that contains the necessary fixes for the heap allocation issue. Network administrators should also consider implementing additional traffic filtering measures to reduce the volume of unknown broadcast, multicast, and unicast traffic reaching the vulnerable devices, particularly when storm control profiling is already in place. The vulnerability's configuration dependency means that organizations with storm control profiling disabled may not be immediately affected, but this should not be considered a permanent mitigation strategy. Security monitoring should include detection of unusual traffic patterns that might indicate exploitation attempts, while network segmentation and access controls should limit potential attack vectors to reduce the overall risk exposure. Organizations should also verify their current Junos OS versions against the affected release notes and ensure that all network devices are properly updated to prevent exploitation of this memory management vulnerability.