CVE-2021-32040 Security Vulnerability & Exploit Details

CVE-2021-32040
Vulnerability Scoring

6.5

/10

High Risk

If left unpatched, CVE-2021-32040 could lead to major system disruptions or data loss.

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: 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-2021-32040 Details

Status: Modified

Last updated: 🕕 21 Nov 2024, 06:06 UTC
Originally published on: 🕒 12 Apr 2022, 15:15 UTC

Time between publication and last update: 953 days

CVSS Release: version 3

CVSS3 Source

cna@mongodb.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2021-32040 Vulnerability Summary

CVE-2021-32040: It may be possible to have an extremely long aggregation pipeline in conjunction with a specific stage/operator and cause a stack overflow due to the size of the stack frames used by that stage. If an attacker could cause such an aggregation to occur, they could maliciously crash MongoDB in a DoS attack. This vulnerability affects MongoDB Server v4.4 versions prior to and including 4.4.28, MongoDB Server v5.0 versions prior to 5.0.4 and MongoDB Server v4.2 versions prior to 4.2.16. Workaround: >= v4.2.16 users and all v4.4 users can add the --setParameter internalPipelineLengthLimit=50 instead of the default 1000 to mongod at startup to prevent a crash.

Assessing the Risk of CVE-2021-32040

Access Complexity Graph

The exploitability of CVE-2021-32040 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-2021-32040

CVE-2021-32040 presents an accessible attack vector with minimal effort required. Restricting access controls and implementing security updates are critical to reducing exploitation 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-2021-32040, 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-2021-32040, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

Confidentiality: None
CVE-2021-32040 has no significant impact on data confidentiality.
Integrity: None
CVE-2021-32040 poses no threat to data integrity.
Availability: High
CVE-2021-32040 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: 0.499% (probability of exploit)

EPSS Percentile: 76.52% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 23.480000000000004% of others.

CVE-2021-32040 References

External References

CWE Common Weakness Enumeration

CWE-787

Vulnerable Configurations

cpe:2.3:a:mongodb:mongodb:4.2.0:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.0:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.1:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.1:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.2:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.2:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.3:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.3:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.4:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.4:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.4:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.4:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.5:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.5:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.5:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.5:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.5:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.5:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.6:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.6:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.6:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.6:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.7:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.7:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.7:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.7:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.7:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.7:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.8:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.8:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.8:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.8:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.9:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.9:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.10:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.10:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.10:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.10:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.11:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.11:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.11:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.11:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.11:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.11:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.12:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.12:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.12:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.12:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.13:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.13:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.13:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.13:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.13:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.13:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.14:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.14:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.14:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.14:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.15:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.15:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.15:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.2.15:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc10:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc10:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc11:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc11:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc12:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc12:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc13:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc13:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc14:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc14:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc3:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc3:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc4:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc4:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc5:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc5:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc6:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc6:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc7:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc7:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc8:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc8:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc9:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.0:rc9:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.1:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.1:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.2:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.2:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.3:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.3:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.4:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.4:*:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.5:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.5:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.6:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.6:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.7:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.7:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.7:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.7:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.8:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.8:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.9:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.9:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.9:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.9:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.10:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:4.4.10:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc2:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc3:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc3:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc4:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc4:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc5:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc5:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc6:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc6:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc7:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc7:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc8:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:rc8:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:alpha:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:alpha:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:alpha0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.0:alpha0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.1:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.1:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.1:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.1:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.2:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.2:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.2:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.2:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.3:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.3:-:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.3:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.3:rc0:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.3:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.3:rc1:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.3:rc2:*:*:*:*:*:*
cpe:2.3:a:mongodb:mongodb:5.0.3:rc2:*:*:*:*:*:*

Protect Your Infrastructure against CVE-2021-32040: 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-2025-2130 – A vulnerability was found in OpenXE up to 1.12. It has been declared as problematic. This vulnerability affects unknown code of the component Ticke...
CVE-2025-26205 – Lua 5.4.7, when the debug library is used, has a out-of-bounds read and segmentation violation in mainpositionTV in ltable.c. NOTE: this is dispute...
CVE-2025-26204 – Lua 5.4.7, when the debug library is used, has a out-of-bounds read and segmentation violation in equalkey in ltable.c. NOTE: this is disputed beca...
CVE-2025-2129 – A vulnerability was found in Mage AI 0.9.75. It has been classified as problematic. This affects an unknown part. The manipulation leads to insecur...
CVE-2025-2127 – A vulnerability was found in JoomlaUX JUX Real Estate 3.4.0 on Joomla. It has been classified as problematic. Affected is an unknown function of th...

CVE-2021-32040 Vulnerability Scoring