CVE-2020-28397 Vulnerability Analysis & Exploit Details

CVE-2020-28397
Vulnerability Scoring

5.3
/10
Significant Risk

Security assessments indicate that CVE-2020-28397 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: Low
    Exploits can be performed without significant complexity or special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2020-28397 Details

Status: Analyzed

Last updated: 🕢 10 Dec 2021, 19:57 UTC
Originally published on: 🕚 10 Aug 2021, 11:15 UTC

Time between publication and last update: 122 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2020-28397 Vulnerability Summary

CVE-2020-28397: A vulnerability has been identified in SIMATIC Drive Controller family (All versions < V2.9.2), SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) (All versions < V21.9), SIMATIC S7 PLCSIM Advanced (All versions > V2 < V4), SIMATIC S7-1200 CPU family (incl. SIPLUS variants) (Version V4.4), SIMATIC S7-1500 CPU family (incl. related ET200 CPUs and SIPLUS variants) (All versions > V2.5 < V2.9.2), SIMATIC S7-1500 Software Controller (All versions > V2.5 < V21.9), TIM 1531 IRC (incl. SIPLUS NET variants) (Version V2.1). Due to an incorrect authorization check in the affected component, an attacker could extract information about access protected PLC program variables over port 102/tcp from an affected device when reading multiple attributes at once.

Assessing the Risk of CVE-2020-28397

Access Complexity Graph

The exploitability of CVE-2020-28397 depends on two key factors: attack complexity (the level of effort required to execute an exploit) and privileges required (the access level an attacker needs).

Exploitability Analysis for CVE-2020-28397

With low attack complexity and no required privileges, CVE-2020-28397 is an easy target for cybercriminals. Organizations should prioritize immediate mitigation measures to prevent unauthorized access and data breaches.

Understanding AC and PR

A lower complexity and fewer privilege requirements make exploitation easier. Security teams should evaluate these aspects to determine the urgency of mitigation strategies, such as patch management and access control policies.

Attack Complexity (AC) measures the difficulty in executing an exploit. A high AC means that specific conditions must be met, making an attack more challenging, while a low AC means the vulnerability can be exploited with minimal effort.

Privileges Required (PR) determine the level of system access necessary for an attack. Vulnerabilities requiring no privileges are more accessible to attackers, whereas high privilege requirements limit exploitation to authorized users with elevated access.

CVSS Score Breakdown Chart

Above is the CVSS Sub-score Breakdown for CVE-2020-28397, 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.

CIA Impact Analysis

Below is the Impact Analysis for CVE-2020-28397, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2020-28397 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: None
    CVE-2020-28397 poses no threat to data integrity.
  • Availability: None
    CVE-2020-28397 does not impact system availability.

Exploit Prediction Scoring System (EPSS)

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

EPSS Score: 0.084% (probability of exploit)

EPSS Percentile: 38.43% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 61.57% of others.

CVE-2020-28397 References

External References

CWE Common Weakness Enumeration

CWE-863

Vulnerable Configurations

  • cpe:2.3:h:siemens:cpu_1504d_tf:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1504d_tf:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1504d_tf_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1504d_tf_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1507d_tf:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1507d_tf:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1507d_tf_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1507d_tf_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1515sp_pc2_tf:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1515sp_pc2_tf:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1515sp_pc2_tf_firmware:-:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1515sp_pc2_tf_firmware:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:simatic_s7_plcsim_advanced:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:simatic_s7_plcsim_advanced:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:simatic_s7_plcsim_advanced_firmware:2.0:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:simatic_s7_plcsim_advanced_firmware:2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:siemens:simatic_s7-1500_software_controller:2.5:*:*:*:*:*:*:*
    cpe:2.3:a:siemens:simatic_s7-1500_software_controller:2.5:*:*:*:*:*:*:*
  • cpe:2.3:a:siemens:simatic_s7-1500_software_controller:2.6:*:*:*:*:*:*:*
    cpe:2.3:a:siemens:simatic_s7-1500_software_controller:2.6:*:*:*:*:*:*:*
  • cpe:2.3:a:siemens:simatic_s7-1500_software_controller:2.7:*:*:*:*:*:*:*
    cpe:2.3:a:siemens:simatic_s7-1500_software_controller:2.7:*:*:*:*:*:*:*
  • cpe:2.3:a:siemens:simatic_s7-1500_software_controller:20.8:*:*:*:*:*:*:*
    cpe:2.3:a:siemens:simatic_s7-1500_software_controller:20.8:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:tim_1531_irc:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:tim_1531_irc:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:tim_1531_irc_firmware:2.1:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:tim_1531_irc_firmware:2.1:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1211c:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1211c:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1211c_firmware:4.4:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1211c_firmware:4.4:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1212c:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1212c:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1212c_firmware:4.4:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1212c_firmware:4.4:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1212fc:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1212fc:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1212fc_firmware:4.4:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1212fc_firmware:4.4:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1214fc_firmware:4.4:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1214fc_firmware:4.4:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1214fc:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1214fc:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1214c_firmware:4.4:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1214c_firmware:4.4:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1214c:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1214c:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1215fc_firmware:4.4:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1215fc_firmware:4.4:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1215fc:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1215fc:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1215c_firmware:4.4:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1215c_firmware:4.4:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1215c:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1215c:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1217c_firmware:4.4:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1217c_firmware:4.4:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1217c:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1217c:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1510sp_f-1pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1510sp_f-1pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1511-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1511-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1511f-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1511f-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1512sp-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1512sp-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1512sp_f-1pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1512sp_f-1pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1513-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1513-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1513f-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1513f-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1516-3_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1516-3_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu-1516f-3_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu-1516f-3_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1518-4_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1518-4_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:siplus_cpu_1518f-4_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:siplus_cpu_1518f-4_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1510sp-1pn_firmware:2.5:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1510sp-1pn_firmware:2.5:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1510sp-1pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1510sp-1pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu1510sp_f-1:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu1510sp_f-1:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1511-1pn_firmware:2.5:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1511-1pn_firmware:2.5:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1511-1pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1511-1pn:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1511c-1_pn_firmware:2.5:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1511c-1_pn_firmware:2.5:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1511c-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1511c-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1511f-1pn_firmware:2.5:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1511f-1pn_firmware:2.5:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1511f-1pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1511f-1pn:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1511t-1pn_firmware:2.5:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1511t-1pn_firmware:2.5:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1511t-1pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1511t-1pn:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1511tf-1pn_firmware:2.5:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1511tf-1pn_firmware:2.5:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1511tf-1pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1511tf-1pn:-:*:*:*:*:*:*:*
  • cpe:2.3:o:siemens:cpu_1512c-1_pn_firmware:2.5:*:*:*:*:*:*:*
    cpe:2.3:o:siemens:cpu_1512c-1_pn_firmware:2.5:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1512c-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1512c-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1512sp-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1512sp-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1512sp_f-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1512sp_f-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1513-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1513-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1513f-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1513f-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1513r-1_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1513r-1_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1513pro_f-2_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1513pro_f-2_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1515-2:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1515-2:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1515f-2:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1515f-2:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1515r-2_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1515r-2_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1515t-2_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1515t-2_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1515tf-2_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1515tf-2_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1516pro_f-2_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1516pro_f-2_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1516pro-2_pn:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1516pro-2_pn:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1516-3:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1516-3:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1516f-3:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1516f-3:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1516t-3_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1516t-3_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1516tf-3_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1516tf-3_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1517-3_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1517-3_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1517f-3_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1517f-3_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1517t-3_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1517t-3_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1517tf-3_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1517tf-3_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1518-4_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1518-4_pn\/dp:-:*:*:*:*:*:*:*
  • cpe:2.3:h:siemens:cpu_1518f-4_pn\/dp:-:*:*:*:*:*:*:*
    cpe:2.3:h:siemens:cpu_1518f-4_pn\/dp:-:*:*:*:*:*:*:*

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