CVE-2020-26232 Vulnerability Analysis & Exploit Details

CVE-2020-26232
Vulnerability Scoring

5.4
/10
Significant Risk

Security assessments indicate that CVE-2020-26232 presents a notable risk, potentially requiring prompt mitigation.

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: Changed
    Successful exploitation can impact components beyond the vulnerable component.
  • User Interaction: Required
    User interaction is necessary for successful exploitation.

CVE-2020-26232 Details

Status: Analyzed

Last updated: 🕗 02 Dec 2020, 20:21 UTC
Originally published on: 🕘 24 Nov 2020, 21:15 UTC

Time between publication and last update: 7 days

CVSS Release: version 3

CVSS3 Source

nvd@nist.gov

CVSS3 Type

Primary

CVSS3 Vector

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

CVE-2020-26232 Vulnerability Summary

CVE-2020-26232: Jupyter Server before version 1.0.6 has an Open redirect vulnerability. A maliciously crafted link to a jupyter server could redirect the browser to a different website. All jupyter servers are technically affected, however, these maliciously crafted links can only be reasonably made for known jupyter server hosts. A link to your jupyter server may appear safe, but ultimately redirect to a spoofed server on the public internet.

Assessing the Risk of CVE-2020-26232

Access Complexity Graph

The exploitability of CVE-2020-26232 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-2020-26232

CVE-2020-26232 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-2020-26232, 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-2020-26232, showing how Confidentiality, Integrity, and Availability might be affected if the vulnerability is exploited. Higher values usually signal greater potential damage.

  • Confidentiality: Low
    CVE-2020-26232 could lead to minor leaks of non-critical information without major privacy breaches.
  • Integrity: Low
    Exploiting CVE-2020-26232 may cause minor changes to data without severely impacting its accuracy.
  • Availability: None
    CVE-2020-26232 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: 0.06% (probability of exploit)

EPSS Percentile: 28.43% (lower percentile = lower relative risk)
This vulnerability is less risky than approximately 71.57% of others.

CVE-2020-26232 References

External References

CWE Common Weakness Enumeration

CWE-601

CAPEC Common Attack Pattern Enumeration and Classification

  • Cross-Site Flashing CAPEC-178 An attacker is able to trick the victim into executing a Flash document that passes commands or calls to a Flash player browser plugin, allowing the attacker to exploit native Flash functionality in the client browser. This attack pattern occurs where an attacker can provide a crafted link to a Flash document (SWF file) which, when followed, will cause additional malicious instructions to be executed. The attacker does not need to serve or control the Flash document. The attack takes advantage of the fact that Flash files can reference external URLs. If variables that serve as URLs that the Flash application references can be controlled through parameters, then by creating a link that includes values for those parameters, an attacker can cause arbitrary content to be referenced and possibly executed by the targeted Flash application.

Vulnerable Configurations

  • cpe:2.3:a:jupyter:jupyter_server:-:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:-:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.0.5:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.0.5:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.1.1:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.1.1:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.2.1:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.2.1:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:0.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:0.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:-:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:-:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc0:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc0:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc1:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc1:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc10:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc10:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc11:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc11:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc12:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc12:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc13:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc13:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc14:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc14:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc15:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc15:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc16:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc16:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc2:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc2:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc3:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc3:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc4:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc4:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc5:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc5:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc6:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc6:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc7:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc7:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc8:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc8:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc9:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.0:rc9:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.1:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.1:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.3:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.3:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:jupyter:jupyter_server:1.0.5:*:*:*:*:*:*:*
    cpe:2.3:a:jupyter:jupyter_server:1.0.5:*:*:*:*:*:*:*

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