CVE-2021-32754 Vulnerability Analysis & Exploit Details

CVE-2021-32754
Vulnerability Scoring

5.3
/10
Significant Risk

Security assessments indicate that CVE-2021-32754 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Network
    Vulnerability is exploitable over a network without physical access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2021-32754 Details

Status: Modified

Last updated: 🕕 21 Nov 2024, 06:07 UTC
Originally published on: 🕚 12 Jul 2021, 23:15 UTC

Time between publication and last update: 1227 days

CVSS Release: version 3

CVSS3 Source

security-advisories@github.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2021-32754 Vulnerability Summary

CVE-2021-32754: FlowDroid is a data flow analysis tool. FlowDroid versions prior to 2.9.0 contained an XML external entity (XXE) vulnerability that allowed an attacker who had control over the source/sink definition file in XML format to read files from external locations. In order for this to occur, the XML-based format for sources and sinks had to be used and the attacker had to able control the source/sink definition file. The vulnerability was patched in version 2.9.0. As a workaround, do not allow untrusted entities to control the source/sink definition file.

Assessing the Risk of CVE-2021-32754

Access Complexity Graph

The exploitability of CVE-2021-32754 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-2021-32754

This vulnerability, CVE-2021-32754, requires a high level of attack complexity and low privileges, making it difficult but not impossible to exploit. Organizations should ensure robust security configurations to mitigate risks.

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-2021-32754, 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-2021-32754, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: High
    Exploiting CVE-2021-32754 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: None
    CVE-2021-32754 poses no threat to data integrity.
  • Availability: None
    CVE-2021-32754 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: 0.063% (probability of exploit)

EPSS Percentile: 30.27% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 69.73% of others.

CVE-2021-32754 References

External References

CWE Common Weakness Enumeration

CWE-611

CAPEC Common Attack Pattern Enumeration and Classification

  • Data Serialization External Entities Blowup CAPEC-221 This attack takes advantage of the entity replacement property of certain data serialization languages (e.g., XML, YAML, etc.) where the value of the replacement is a URI. A well-crafted file could have the entity refer to a URI that consumes a large amount of resources to create a denial of service condition. This can cause the system to either freeze, crash, or execute arbitrary code depending on the URI.

Vulnerable Configurations

  • cpe:2.3:a:flowdroid_project:flowdroid:2.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:flowdroid_project:flowdroid:2.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:flowdroid_project:flowdroid:2.6:*:*:*:*:*:*:*
    cpe:2.3:a:flowdroid_project:flowdroid:2.6:*:*:*:*:*:*:*
  • cpe:2.3:a:flowdroid_project:flowdroid:2.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:flowdroid_project:flowdroid:2.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:flowdroid_project:flowdroid:2.7:*:*:*:*:*:*:*
    cpe:2.3:a:flowdroid_project:flowdroid:2.7:*:*:*:*:*:*:*
  • cpe:2.3:a:flowdroid_project:flowdroid:2.7.1:*:*:*:*:*:*:*
    cpe:2.3:a:flowdroid_project:flowdroid:2.7.1:*:*:*:*:*:*:*
  • cpe:2.3:a:flowdroid_project:flowdroid:2.8:*:*:*:*:*:*:*
    cpe:2.3:a:flowdroid_project:flowdroid:2.8:*:*:*:*:*:*:*

Protect Your Infrastructure against CVE-2021-32754: Combat Critical CVE Threats

Stay updated with real-time CVE vulnerabilities and take action to secure your systems. Enhance your cybersecurity posture with the latest threat intelligence and mitigation techniques. Develop the skills necessary to defend against CVEs and secure critical infrastructures. Join the top cybersecurity professionals safeguarding today's infrastructures.

Other 5 Recently Published CVEs Vulnerabilities

  • CVE-2024-43107 – Improper Certificate Validation (CWE-295) in the Gallagher Milestone Integration Plugin (MIP) permits unauthenticated messages (e.g. alarm events) ...
  • CVE-2024-41724 – Improper Certificate Validation (CWE-295) in the Gallagher Command Centre SALTO integration allowed an attacker to spoof the SALTO server. Thi...
  • CVE-2025-2133 – A vulnerability classified as problematic was found in ftcms 2.1. Affected by this vulnerability is an unknown functionality of the file /admin/ind...
  • CVE-2025-2132 – A vulnerability classified as critical has been found in ftcms 2.1. Affected is an unknown function of the file /admin/index.php/web/ajax_all_lists...
  • CVE-2025-2131 – A vulnerability was found in dayrui XunRuiCMS up to 4.6.3. It has been rated as problematic. This issue affects some unknown processing of the comp...