CVE-2021-37847 Security Vulnerability & Exploit Details

CVE-2021-37847
Vulnerability Scoring

7.5

/10

Very High Risk

Highly exploitable, CVE-2021-37847 poses a critical security risk that could lead to severe breaches.

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

CVE-2021-37847 Details

Status: Modified

Last updated: 🕕 21 Nov 2024, 06:15 UTC
Originally published on: 🕗 02 Aug 2021, 20:15 UTC

Time between publication and last update: 1206 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2021-37847 Vulnerability Summary

CVE-2021-37847: crypto/digest.c in Pengutronix barebox through 2021.07.0 leaks timing information because memcmp is used during digest verification.

Assessing the Risk of CVE-2021-37847

Access Complexity Graph

The exploitability of CVE-2021-37847 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-2021-37847

With low attack complexity and no required privileges, CVE-2021-37847 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-2021-37847, 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-2021-37847, 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-2021-37847 can result in unauthorized access to sensitive data, severely compromising data privacy.
Integrity: None
CVE-2021-37847 poses no threat to data integrity.
Availability: None
CVE-2021-37847 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: 0.36% (probability of exploit)

EPSS Percentile: 72.42% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 27.58% of others.

CVE-2021-37847 References

External References

CWE Common Weakness Enumeration

NVD-CWE-noinfo

Vulnerable Configurations

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cpe:2.3:a:pengutronix:barebox:2010.02.0:*:*:*:*:*:*:*
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cpe:2.3:a:pengutronix:barebox:2018.04.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.05.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.05.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.06.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.06.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.07.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.07.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.07.1:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.07.1:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.07.2:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.07.2:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.08.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.08.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.8.1:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.8.1:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.09.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.09.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.10.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.10.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.11.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.11.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.12.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2018.12.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.01.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.01.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.02.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.02.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.03.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.03.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.04.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.04.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.05.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.05.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.06.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.06.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.06.1:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.06.1:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.07.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.07.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.08.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.08.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.08.1:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2019.08.1:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2020.05.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2020.05.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2021.07.0:*:*:*:*:*:*:*
cpe:2.3:a:pengutronix:barebox:2021.07.0:*:*:*:*:*:*:*

Protect Your Infrastructure against CVE-2021-37847: Combat Critical CVE Threats

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