CVE-2020-12524 Vulnerability Analysis & Exploit Details

Status: Analyzed - Last modified: 04 Dec 2020, 21:45 UTC Published: 02 Dec 2020, 15:15 UTC

CVE-2020-12524
Vulnerability Scoring

7.5
/10

Attack Complexity Details

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

CIA Impact Definition

  • Confidentiality:
  • Integrity:
  • Availability: HIGH IMPACT

CVE-2020-12524 Vulnerability Summary

Uncontrolled Resource Consumption can be exploited to cause the Phoenix Contact HMIs BTP 2043W, BTP 2070W and BTP 2102W in all versions to become unresponsive and not accurately update the display content (Denial of Service).

Access Complexity Graph

Above is the Access Complexity Graph for CVE-2020-12524. 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-2020-12524, 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-2020-12524, 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: 0.094% (probability of exploit)

EPSS Percentile: 41.69% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 58.31% of others.

CVE-2020-12524 Detailed Information and External References

References

CWE

CWE-400

CAPEC

  • XML Ping of the Death CAPEC-147 An attacker initiates a resource depletion attack where a large number of small XML messages are delivered at a sufficiently rapid rate to cause a denial of service or crash of the target. Transactions such as repetitive SOAP transactions can deplete resources faster than a simple flooding attack because of the additional resources used by the SOAP protocol and the resources necessary to process SOAP messages. The transactions used are immaterial as long as they cause resource utilization on the target. In other words, this is a normal flooding attack augmented by using messages that will require extra processing on the target.
  • Sustained Client Engagement CAPEC-227 An adversary attempts to deny legitimate users access to a resource by continually engaging a specific resource in an attempt to keep the resource tied up as long as possible. The adversary's primary goal is not to crash or flood the target, which would alert defenders; rather it is to repeatedly perform actions or abuse algorithmic flaws such that a given resource is tied up and not available to a legitimate user. By carefully crafting a requests that keep the resource engaged through what is seemingly benign requests, legitimate users are limited or completely denied access to the resource.
  • Regular Expression Exponential Blowup CAPEC-492 An adversary may execute an attack on a program that uses a poor Regular Expression(Regex) implementation by choosing input that results in an extreme situation for the Regex. A typical extreme situation operates at exponential time compared to the input size. This is due to most implementations using a Nondeterministic Finite Automaton(NFA) state machine to be built by the Regex algorithm since NFA allows backtracking and thus more complex regular expressions.

Vulnerable Configurations

  • cpe:2.3:o:phoenixcontact:btp_2043w_firmware:*:*:*:*:*:*:*:*
    cpe:2.3:o:phoenixcontact:btp_2043w_firmware:*:*:*:*:*:*:*:*
  • cpe:2.3:h:phoenixcontact:btp_2043w:-:*:*:*:*:*:*:*
    cpe:2.3:h:phoenixcontact:btp_2043w:-:*:*:*:*:*:*:*
  • cpe:2.3:o:phoenixcontact:btp_2070w_firmware:*:*:*:*:*:*:*:*
    cpe:2.3:o:phoenixcontact:btp_2070w_firmware:*:*:*:*:*:*:*:*
  • cpe:2.3:h:phoenixcontact:btp_2070w:-:*:*:*:*:*:*:*
    cpe:2.3:h:phoenixcontact:btp_2070w:-:*:*:*:*:*:*:*
  • cpe:2.3:o:phoenixcontact:btp_2102w_firmware:*:*:*:*:*:*:*:*
    cpe:2.3:o:phoenixcontact:btp_2102w_firmware:*:*:*:*:*:*:*:*
  • cpe:2.3:h:phoenixcontact:btp_2102w:-:*:*:*:*:*:*:*
    cpe:2.3:h:phoenixcontact:btp_2102w:-:*:*:*:*:*:*:*

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

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