CVE-2021-21237 Vulnerability Analysis & Exploit Details

CVE-2021-21237
Vulnerability Scoring

7.2
/10
Very High Risk

Highly exploitable, CVE-2021-21237 poses a critical security risk that could lead to severe breaches.

Attack Complexity Details

  • Attack Complexity: High
    Exploits require significant effort and special conditions.
  • Attack Vector: Local
    Vulnerability requires local system access.
  • Privileges Required: Low
    Some privileges are necessary to exploit the vulnerability.
  • Scope: Changed
    Successful exploitation can impact components beyond the vulnerable component.
  • User Interaction: Required
    User interaction is necessary for successful exploitation.

CVE-2021-21237 Details

Status: Modified

Last updated: 🕠 21 Nov 2024, 05:47 UTC
Originally published on: 🕕 15 Jan 2021, 18:15 UTC

Time between publication and last update: 1405 days

CVSS Release: version 3

CVSS3 Source

security-advisories@github.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2021-21237 Vulnerability Summary

CVE-2021-21237: Git LFS is a command line extension for managing large files with Git. On Windows, if Git LFS operates on a malicious repository with a git.bat or git.exe file in the current directory, that program would be executed, permitting the attacker to execute arbitrary code. This does not affect Unix systems. This is the result of an incomplete fix for CVE-2020-27955. This issue occurs because on Windows, Go includes (and prefers) the current directory when the name of a command run does not contain a directory separator. Other than avoiding untrusted repositories or using a different operating system, there is no workaround. This is fixed in v2.13.2.

Assessing the Risk of CVE-2021-21237

Access Complexity Graph

The exploitability of CVE-2021-21237 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-2021-21237

This vulnerability, CVE-2021-21237, 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-2021-21237, 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-2021-21237, 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-2021-21237 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2021-21237 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: None
    CVE-2021-21237 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: 0.043% (probability of exploit)

EPSS Percentile: 12.28% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 87.72% of others.

CVE-2021-21237 References

External References

CWE Common Weakness Enumeration

CWE-426

CAPEC Common Attack Pattern Enumeration and Classification

  • Leveraging/Manipulating Configuration File Search Paths CAPEC-38 This pattern of attack sees an adversary load a malicious resource into a program's standard path so that when a known command is executed then the system instead executes the malicious component. The adversary can either modify the search path a program uses, like a PATH variable or classpath, or they can manipulate resources on the path to point to their malicious components. J2EE applications and other component based applications that are built from multiple binaries can have very long list of dependencies to execute. If one of these libraries and/or references is controllable by the attacker then application controls can be circumvented by the attacker.

Vulnerable Configurations

  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.1:p1:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.1:p1:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.3:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.3:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.3:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.4:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.4:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.5:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.5:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.6:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.3.6:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.4.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.4.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.0:pre1:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.0:pre1:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.0:pre2:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.0:pre2:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.2:beta1:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.2:beta1:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.3:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.3:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.4:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.5.4:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:0.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.3:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.3:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.4:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.4.4:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.3:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.3:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.4:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.4:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.5:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.5:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.6:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:1.5.6:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.0.2:rc1:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.0.2:rc1:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.3:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.3:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.4:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.3.4:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.5.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.5.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.7.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.7.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.7.2:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.7.2:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.8.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.12.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.12.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.12.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.12.1:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.13.0:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.13.0:*:*:*:*:*:*:*
  • cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.13.1:*:*:*:*:*:*:*
    cpe:2.3:a:git_large_file_storage_project:git_large_file_storage:2.13.1:*:*:*:*:*:*:*

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  • 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...