CVE-2021-34337 Vulnerability Analysis & Exploit Details

CVE-2021-34337
Vulnerability Scoring

6.3
/10
High Risk

If left unpatched, CVE-2021-34337 could lead to major system disruptions or data loss.

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: Unchanged
    Exploit remains within the originally vulnerable component.
  • User Interaction: None
    No user interaction is necessary for exploitation.

CVE-2021-34337 Details

Status: Modified

Last updated: 🕔 06 Feb 2025, 17:15 UTC
Originally published on: 🕗 15 Apr 2023, 20:16 UTC

Time between publication and last update: 662 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2021-34337 Vulnerability Summary

CVE-2021-34337: An issue was discovered in Mailman Core before 3.3.5. An attacker with access to the REST API could use timing attacks to determine the value of the configured REST API password and then make arbitrary REST API calls. The REST API is bound to localhost by default, limiting the ability for attackers to exploit this, but can optionally be made to listen on other interfaces.

Assessing the Risk of CVE-2021-34337

Access Complexity Graph

The exploitability of CVE-2021-34337 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-2021-34337

This vulnerability, CVE-2021-34337, 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-2021-34337, 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-2021-34337, 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-2021-34337 can result in unauthorized access to sensitive data, severely compromising data privacy.
  • Integrity: High
    CVE-2021-34337 could allow unauthorized modifications to data, potentially affecting system reliability and trust.
  • Availability: None
    CVE-2021-34337 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: 0.047% (probability of exploit)

EPSS Percentile: 20.23% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 79.77% of others.

CVE-2021-34337 References

External References

CWE Common Weakness Enumeration

CWE-208

CAPEC Common Attack Pattern Enumeration and Classification

  • Cross-Domain Search Timing CAPEC-462 An attacker initiates cross domain HTTP / GET requests and times the server responses. The timing of these responses may leak important information on what is happening on the server. Browser's same origin policy prevents the attacker from directly reading the server responses (in the absence of any other weaknesses), but does not prevent the attacker from timing the responses to requests that the attacker issued cross domain.
  • Application Fingerprinting CAPEC-541 An adversary engages in fingerprinting activities to determine the type or version of an application installed on a remote target.
  • System Footprinting CAPEC-580 An adversary engages in active probing and exploration activities to determine security information about a remote target system. Often times adversaries will rely on remote applications that can be probed for system configurations.

Vulnerable Configurations

  • cpe:2.3:a:gnu:mailman:-:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:-:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:1.0:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:1.1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.5:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.5:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.6:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.6:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.7:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.7:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.8:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.8:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.9:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.9:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.10:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.10:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.11:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.11:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.12:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.12:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.13:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.13:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0.14:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0.14:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0:beta3:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0:beta3:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0:beta4:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0:beta4:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.0:beta5:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.0:beta5:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.10b1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.10b1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.10b3:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.10b3:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.10b4:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.10b4:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.14-1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.14-1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.18-1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.18-1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.1:beta1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.1:beta1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.4:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.4:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.5:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.5:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.5.8:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.5.8:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.6:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.6:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.7:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.7:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.8:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.8:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.9:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.9:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1b1:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1b1:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.10:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.10:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.10:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.10:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.11:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.11:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.11:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.11:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.11:rc2:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.11:rc2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.12:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.12:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.12:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.12:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.12:rc2:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.12:rc2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.13:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.13:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.13:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.13:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.14:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.14:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.14:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.14:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.15:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.15:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.15:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.15:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.16:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.16:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.16:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.16:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.16:rc2:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.16:rc2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.16:rc3:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.16:rc3:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.17:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.17:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.18:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.18:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.18:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.18:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.18:rc2:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.18:rc2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.18:rc3:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.18:rc3:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.19:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.19:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.19:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.19:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.19:rc2:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.19:rc2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.19:rc3:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.19:rc3:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.20:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.20:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.21:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.21:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.21:rc2:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.21:rc2:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.22:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.22:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.23:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.23:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.24:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.24:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.25:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.25:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.26:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.26:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.27:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.27:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.28:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.28:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.29:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.29:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.30:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.30:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.31:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.31:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.33:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.33:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.34:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.34:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.35:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.35:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.36:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.36:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1.37:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1.37:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1:beta:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1:beta:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1:alpha:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1:alpha:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:2.1:stable:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:2.1:stable:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:3.1.0:-:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:3.1.0:-:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:3.1.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:3.1.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:3.2.1:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:3.2.1:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:3.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:3.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:3.3.1:-:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:3.3.1:-:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:3.3.1:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:3.3.1:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:3.3.2:-:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:3.3.2:-:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:3.3.2:rc1:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:3.3.2:rc1:*:*:*:*:*:*
  • cpe:2.3:a:gnu:mailman:3.3.2:rc2:*:*:*:*:*:*
    cpe:2.3:a:gnu:mailman:3.3.2:rc2:*:*:*:*:*:*

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