CVE-2020-21913 Vulnerability Analysis & Exploit Details

CVE-2020-21913
Vulnerability Scoring

5.5
/10
Significant Risk

Security assessments indicate that CVE-2020-21913 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: Local
    Vulnerability requires local system access.
  • Privileges Required: None
    No privileges are required for exploitation.
  • Scope: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: Required
    User interaction is necessary for successful exploitation.

CVE-2020-21913 Details

Status: Analyzed

Last updated: 🕔 29 Nov 2021, 17:20 UTC
Originally published on: 🕑 20 Sep 2021, 14:15 UTC

Time between publication and last update: 70 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2020-21913 Vulnerability Summary

CVE-2020-21913: International Components for Unicode (ICU-20850) v66.1 was discovered to contain a use after free bug in the pkg_createWithAssemblyCode function in the file tools/pkgdata/pkgdata.cpp.

Assessing the Risk of CVE-2020-21913

Access Complexity Graph

The exploitability of CVE-2020-21913 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-2020-21913

With low attack complexity and no required privileges, CVE-2020-21913 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-2020-21913, 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-2020-21913, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2020-21913 has no significant impact on data confidentiality.
  • Integrity: None
    CVE-2020-21913 poses no threat to data integrity.
  • Availability: High
    CVE-2020-21913 can disrupt system operations, potentially causing complete denial of service (DoS).

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: 38.58% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 61.42% of others.

CVE-2020-21913 References

External References

CWE Common Weakness Enumeration

CWE-416

Vulnerable Configurations

  • cpe:2.3:a:unicode:international_components_for_unicode:4.8.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:4.8.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:50.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:50.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:50.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:50.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:51.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:51.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:51.3:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:51.3:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:52.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:52.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:52.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:52.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:52.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:52.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:53.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:53.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:53.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:53.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:54.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:54.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:54.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:54.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:54.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:54.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:55.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:55.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:55.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:55.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:56.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:56.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:56.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:56.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:57.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:57.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:57.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:57.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:58.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:58.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:58.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:58.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:58.3:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:58.3:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:59.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:59.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:59.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:59.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:59:rc:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:59:rc:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:60.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:60.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:60.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:60.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:60.3:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:60.3:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:60:rc:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:60:rc:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:61.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:61.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:61.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:61.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:61:rc:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:61:rc:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:62.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:62.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:62.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:62.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:62:rc:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:62:rc:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:63.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:63.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:63.2:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:63.2:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:63:rc:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:63:rc:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:64.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:64.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:64.2:-:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:64.2:-:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:64.2:rc:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:64.2:rc:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:64:rc:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:64:rc:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:64:rc2:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:64:rc2:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:65.1:*:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:65.1:*:*:*:*:*:*:*
  • cpe:2.3:a:unicode:international_components_for_unicode:65:rc:*:*:*:*:*:*
    cpe:2.3:a:unicode:international_components_for_unicode:65:rc:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*
  • cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*
    cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*

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