CVE-2020-4756 Vulnerability Analysis & Exploit Details

Status: Analyzed - Published: 20 Oct 2020, 15:15 UTC

CVE-2020-4756
Vulnerability Scoring

5.5
/10

Attack Complexity Details

  • Attack Complexity: Low Impact
  • Attack Vector: LOCAL
  • Privileges Required: Low Impact
  • Scope: UNCHANGED
  • User Interaction: NONE

CIA Impact Definition

  • Confidentiality:
  • Integrity:
  • Availability: HIGH IMPACT

CVE-2020-4756 Vulnerability Summary

IBM Spectrum Scale V4.2.0.0 through V4.2.3.23 and V5.0.0.0 through V5.0.5.2 as well as IBM Elastic Storage System 6.0.0 through 6.0.1.0 could allow a local attacker to invoke a subset of ioctls on the device with invalid arguments that could crash the keneral and cause a denial of service. IBM X-Force ID: 188599.

Access Complexity Graph

Above is the Access Complexity Graph for CVE-2020-4756. It helps visualize the difficulty level and privilege requirements needed to exploit this vulnerability, providing a quick assessment of its exploitation feasibility.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2020-4756, illustrating how Base, Impact, and Exploitability factors combine to form the overall severity rating. A higher sub-score typically indicates a more severe or easier-to-exploit vulnerability.

Impact Analysis

Below is the Impact Analysis for CVE-2020-4756, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.042% (probability of exploit)

EPSS Percentile: 5.03% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 94.97% of others.

CVE-2020-4756 Detailed Information and External References

References

CWE

CWE-404

CAPEC

  • Flooding CAPEC-125 An adversary consumes the resources of a target by rapidly engaging in a large number of interactions with the target. This type of attack generally exposes a weakness in rate limiting or flow. When successful this attack prevents legitimate users from accessing the service and can cause the target to crash. This attack differs from resource depletion through leaks or allocations in that the latter attacks do not rely on the volume of requests made to the target but instead focus on manipulation of the target's operations. The key factor in a flooding attack is the number of requests the adversary can make in a given period of time. The greater this number, the more likely an attack is to succeed against a given target.
  • Excessive Allocation CAPEC-130 An adversary causes the target to allocate excessive resources to servicing the attackers' request, thereby reducing the resources available for legitimate services and degrading or denying services. Usually, this attack focuses on memory allocation, but any finite resource on the target could be the attacked, including bandwidth, processing cycles, or other resources. This attack does not attempt to force this allocation through a large number of requests (that would be Resource Depletion through Flooding) but instead uses one or a small number of requests that are carefully formatted to force the target to allocate excessive resources to service this request(s). Often this attack takes advantage of a bug in the target to cause the target to allocate resources vastly beyond what would be needed for a normal request.
  • Resource Leak Exposure CAPEC-131 An adversary utilizes a resource leak on the target to deplete the quantity of the resource available to service legitimate requests.
  • TCP Fragmentation CAPEC-494 An adversary may execute a TCP Fragmentation attack against a target with the intention of avoiding filtering rules of network controls, by attempting to fragment the TCP packet such that the headers flag field is pushed into the second fragment which typically is not filtered.
  • UDP Fragmentation CAPEC-495 An attacker may execute a UDP Fragmentation attack against a target server in an attempt to consume resources such as bandwidth and CPU. IP fragmentation occurs when an IP datagram is larger than the MTU of the route the datagram has to traverse. Typically the attacker will use large UDP packets over 1500 bytes of data which forces fragmentation as ethernet MTU is 1500 bytes. This attack is a variation on a typical UDP flood but it enables more network bandwidth to be consumed with fewer packets. Additionally it has the potential to consume server CPU resources and fill memory buffers associated with the processing and reassembling of fragmented packets.
  • ICMP Fragmentation CAPEC-496 An attacker may execute a ICMP Fragmentation attack against a target with the intention of consuming resources or causing a crash. The attacker crafts a large number of identical fragmented IP packets containing a portion of a fragmented ICMP message. The attacker these sends these messages to a target host which causes the host to become non-responsive. Another vector may be sending a fragmented ICMP message to a target host with incorrect sizes in the header which causes the host to hang.
  • BlueSmacking CAPEC-666 An adversary uses Bluetooth flooding to transfer large packets to Bluetooth enabled devices over the L2CAP protocol with the goal of creating a DoS. This attack must be carried out within close proximity to a Bluetooth enabled device.

Vulnerable Configurations

  • cpe:2.3:a:ibm:elastic_storage_server:6.0.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:elastic_storage_server:6.0.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:elastic_storage_server:6.0.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:elastic_storage_server:6.0.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.3:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.3:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.4:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.4:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.5:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.5:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.6:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.6:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.7:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.7:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.8:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.8:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.9:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.9:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.10:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.10:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.11:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.11:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.12:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.12:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.13:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.13:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.14:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.14:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.15:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.15:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.17:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.17:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.18:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.18:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.19:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.19:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.20:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.20:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.21:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.21:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.22:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.22:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:4.2.3.23:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:4.2.3.23:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.2.3:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.4.3:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.4.4:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.4.4:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.5:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.5:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:ibm:spectrum_scale:5.0.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:ibm:spectrum_scale:5.0.5.2:*:*:*:*:*:*:*

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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