CVE-2023-23931 Vulnerability Analysis & Exploit Details

CVE-2023-23931
Vulnerability Scoring

4.8
/10
Medium Risk

The vulnerability CVE-2023-23931 could compromise system integrity but typically requires user interaction to be exploited.

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-2023-23931 Details

Status: Modified

Last updated: 🕢 21 Nov 2024, 07:47 UTC
Originally published on: 🕘 07 Feb 2023, 21:15 UTC

Time between publication and last update: 652 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:N/I:L/A:L

CVE-2023-23931 Vulnerability Summary

CVE-2023-23931: cryptography is a package designed to expose cryptographic primitives and recipes to Python developers. In affected versions `Cipher.update_into` would accept Python objects which implement the buffer protocol, but provide only immutable buffers. This would allow immutable objects (such as `bytes`) to be mutated, thus violating fundamental rules of Python and resulting in corrupted output. This now correctly raises an exception. This issue has been present since `update_into` was originally introduced in cryptography 1.8.

Assessing the Risk of CVE-2023-23931

Access Complexity Graph

The exploitability of CVE-2023-23931 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-2023-23931

CVE-2023-23931 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-2023-23931, 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-2023-23931, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: None
    CVE-2023-23931 has no significant impact on data confidentiality.
  • Integrity: Low
    Exploiting CVE-2023-23931 may cause minor changes to data without severely impacting its accuracy.
  • Availability: Low
    CVE-2023-23931 may slightly degrade system performance without fully affecting service availability.

Exploit Prediction Scoring System (EPSS)

The EPSS score estimates the probability that this vulnerability will be exploited in the near future.

EPSS Score: 0.075% (probability of exploit)

EPSS Percentile: 35.77% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 64.22999999999999% of others.

CVE-2023-23931 References

External References

CWE Common Weakness Enumeration

CWE-754

Vulnerable Configurations

  • cpe:2.3:a:cryptography.io:cryptography:1.8:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:1.8:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:1.8:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:1.8:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:1.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:1.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:1.8.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:1.8.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:1.8.2:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:1.8.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:1.8.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:1.8.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:1.9:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:1.9:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:1.9:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:1.9:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.0:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.0:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.0:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.0.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.0.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.0.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.0.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.0.3:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.0.3:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1.3:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1.3:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1.3:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1.3:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1.4:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1.4:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.1.4:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.1.4:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.2:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.2.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.2.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.2.2:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.2.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.2.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.2.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.3:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.3:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.3:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.3:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.3.1:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.3.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.3.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.3.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.4:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.4:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.4:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.4:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.4.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.4.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.4.2:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.4.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.4.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.4.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.5:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.5:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.5:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.5:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.6:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.6:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.6:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.6:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.6.1:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.6.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.6.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.6.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.7:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.7:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.7:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.7:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.8:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.8:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.8:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.8:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.9:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.9:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.9:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.9:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.9.1:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.9.1:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.9.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.9.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.9.2:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.9.2:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:2.9.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:2.9.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.0:*:*:*:*:*:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.0:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.0:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.1.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.1.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.2.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.2.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.3:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.3:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.3.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.3.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.3.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.3.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.4:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.4:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.4.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.4.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.4.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.4.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.4.3:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.4.3:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.4.4:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.4.4:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.4.5:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.4.5:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.4.6:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.4.6:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.4.7:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.4.7:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:3.4.8:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:3.4.8:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:35.0.0:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:35.0.0:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:36.0.0:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:36.0.0:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:36.0.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:36.0.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:36.0.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:36.0.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:37.0.0:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:37.0.0:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:37.0.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:37.0.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:37.0.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:37.0.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:37.0.3:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:37.0.3:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:37.0.4:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:37.0.4:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:38.0.0:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:38.0.0:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:38.0.1:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:38.0.1:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:38.0.2:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:38.0.2:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:38.0.3:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:38.0.3:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:38.0.4:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:38.0.4:*:*:*:*:python:*:*
  • cpe:2.3:a:cryptography.io:cryptography:39.0.0:*:*:*:*:python:*:*
    cpe:2.3:a:cryptography.io:cryptography:39.0.0:*:*:*:*:python:*:*

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