CVE-2021-29443 Security Vulnerability & Exploit Details

CVE-2021-29443
Vulnerability Scoring

5.9

/10

Significant Risk

Security assessments indicate that CVE-2021-29443 presents a notable risk, potentially requiring prompt mitigation.

Attack Complexity Details

Attack Complexity: High
Exploits require significant effort and 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-2021-29443 Details

Status: Modified

Last updated: 🕕 21 Nov 2024, 06:01 UTC
Originally published on: 🕕 16 Apr 2021, 18:15 UTC

Time between publication and last update: 1314 days

CVSS Release: version 3

CVSS3 Source

security-advisories@github.com

CVSS3 Type

Secondary

CVSS3 Vector

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

CVE-2021-29443 Vulnerability Summary

CVE-2021-29443: jose is an npm library providing a number of cryptographic operations. In vulnerable versions AES_CBC_HMAC_SHA2 Algorithm (A128CBC-HS256, A192CBC-HS384, A256CBC-HS512) decryption would always execute both HMAC tag verification and CBC decryption, if either failed `JWEDecryptionFailed` would be thrown. A possibly observable difference in timing when padding error would occur while decrypting the ciphertext makes a padding oracle and an adversary might be able to make use of that oracle to decrypt data without knowing the decryption key by issuing on average 128*b calls to the padding oracle (where b is the number of bytes in the ciphertext block). All major release versions have had a patch released which ensures the HMAC tag is verified before performing CBC decryption. The fixed versions are `^1.28.1 || ^2.0.5 || >=3.11.4`. Users should upgrade their v1.x dependency to ^1.28.1, their v2.x dependency to ^2.0.5, and their v3.x dependency to ^3.11.4. Thanks to Jason from Microsoft Vulnerability Research (MSVR) for bringing this up and Eva Sarafianou (@esarafianou) for helping to score this advisory.

Assessing the Risk of CVE-2021-29443

Access Complexity Graph

The exploitability of CVE-2021-29443 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-2021-29443

CVE-2021-29443 presents a challenge to exploit due to its high attack complexity, but the absence of privilege requirements still makes it a viable target for skilled attackers. A thorough security review is advised.

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-2021-29443, 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-2021-29443, 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-2021-29443 can result in unauthorized access to sensitive data, severely compromising data privacy.
Integrity: None
CVE-2021-29443 poses no threat to data integrity.
Availability: None
CVE-2021-29443 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: 0.137% (probability of exploit)

EPSS Percentile: 50.62% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 49.38% of others.

CVE-2021-29443 References

External References

CWE Common Weakness Enumeration

CWE-203

CAPEC Common Attack Pattern Enumeration and Classification

Black Box Reverse Engineering CAPEC-189 An adversary discovers the structure, function, and composition of a type of computer software through black box analysis techniques. 'Black Box' methods involve interacting with the software indirectly, in the absence of direct access to the executable object. Such analysis typically involves interacting with the software at the boundaries of where the software interfaces with a larger execution environment, such as input-output vectors, libraries, or APIs. Black Box Reverse Engineering also refers to gathering physical side effects of a hardware device, such as electromagnetic radiation or sounds.

Vulnerable Configurations

cpe:2.3:a:jose_project:jose:1.0.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.0.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.0.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.0.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.0.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.0.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.3.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.3.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.4.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.4.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.4.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.4.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.5.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.5.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.5.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.5.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.5.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.5.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.6.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.6.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.6.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.6.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.7.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.7.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.8.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.8.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.9.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.9.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.9.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.9.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.9.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.9.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.10.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.10.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.10.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.10.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.10.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.10.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.11.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.11.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.12.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.12.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.12.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.12.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.13.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.13.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.14.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.14.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.15.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.15.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.15.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.15.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.16.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.16.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.16.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.16.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.16.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.16.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.17.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.17.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.17.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.17.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.17.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.17.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.18.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.18.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.18.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.18.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.18.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.18.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.19.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.19.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.20.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.20.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.21.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.21.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.21.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.21.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.22.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.22.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.22.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.22.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.22.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.22.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.23.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.23.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.24.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.24.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.24.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.24.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.25.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.25.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.25.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.25.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.25.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.25.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.26.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.26.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.26.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.26.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.27.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.27.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.27.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.27.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.27.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.27.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.27.3:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.27.3:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.28.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:1.28.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.3:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.3:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.4:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:2.0.4:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.0.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.0.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.0.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.0.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.0.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.0.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.1.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.1.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.1.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.1.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.1.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.1.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.1.3:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.1.3:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.2.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.2.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.3.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.3.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.3.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.3.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.3.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.3.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.4.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.4.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.3:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.3:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.4:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.5.4:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.6.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.6.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.6.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.6.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.6.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.6.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.7.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.7.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.7.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.7.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.8.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.8.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.9.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.9.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.10.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.10.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.11.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.11.0:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.11.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.11.1:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.11.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.11.2:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.11.3:*:*:*:*:node.js:*:*
cpe:2.3:a:jose_project:jose:3.11.3:*:*:*:*:node.js:*:*

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CVE-2021-29443 Vulnerability Scoring