CVE-2020-26892: Vulnerability Analysis & Exploit Details

Status: Modified - Last modified: 07-11-2023 Published: 06-11-2020

CVE-2020-26892
Vulnerability Scoring

9.8
/10

Attack Complexity Details

  • Attack Complexity: Low Impact
  • Attack Vector: NETWORK
  • Privileges Required: None
  • Scope: UNCHANGED
  • User Interaction: NONE

CIA Impact Definition

  • Confidentiality: HIGH IMPACT
  • Integrity: HIGH IMPACT
  • Availability: HIGH IMPACT

CVE-2020-26892 Vulnerability Summary

The JWT library in NATS nats-server before 2.1.9 has Incorrect Access Control because of how expired credentials are handled.

Access Complexity Graph for CVE-2020-26892

Impact Analysis for CVE-2020-26892

CVE-2020-26892: Detailed Information and External References

EPSS

0.00162

EPSS %

0.53878

References

0.00162

CWE

CWE-798

CAPEC

0.00162

  • Read Sensitive Constants Within an Executable: An adversary engages in activities to discover any sensitive constants present within the compiled code of an executable. These constants may include literal ASCII strings within the file itself, or possibly strings hard-coded into particular routines that can be revealed by code refactoring methods including static and dynamic analysis.
  • Try Common or Default Usernames and Passwords: An adversary may try certain common or default usernames and passwords to gain access into the system and perform unauthorized actions. An adversary may try an intelligent brute force using empty passwords, known vendor default credentials, as well as a dictionary of common usernames and passwords. Many vendor products come preconfigured with default (and thus well-known) usernames and passwords that should be deleted prior to usage in a production environment. It is a common mistake to forget to remove these default login credentials. Another problem is that users would pick very simple (common) passwords (e.g. "secret" or "password") that make it easier for the attacker to gain access to the system compared to using a brute force attack or even a dictionary attack using a full dictionary.

Vulnerable Configurations

  • cpe:2.3:a:linuxfoundation:nats-server:-:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:-:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.5.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.5.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.5.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.5.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.5.4:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.5.4:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.5.6:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.5.6:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.6.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.6.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.6.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.6.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.6.4:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.6.4:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.6.6:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.6.6:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.6.8:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.6.8:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.7.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.7.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.7.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.7.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.8.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.8.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.8.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.8.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.9.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.9.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.9.4:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.9.4:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:0.9.6:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:0.9.6:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:1.0.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:1.0.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:1.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:1.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:1.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:1.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:1.0.6:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:1.0.6:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:1.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:1.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:1.2.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:1.2.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:1.3.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:1.3.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:1.4.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:1.4.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:1.4.1:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:1.4.1:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.0.0:-:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.0.0:-:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.0.0:rc14:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.0.0:rc14:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.0.0:rc19:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.0.0:rc19:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.0.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.0.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.0.4:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.0.4:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.1.0:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.1.0:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.1.2:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.1.2:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.1.4:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.1.4:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.1.6:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.1.6:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.1.7:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.1.7:*:*:*:*:*:*:*
  • cpe:2.3:a:linuxfoundation:nats-server:2.1.8:*:*:*:*:*:*:*
    cpe:2.3:a:linuxfoundation:nats-server:2.1.8:*:*:*:*:*:*:*
  • cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*
    cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

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:H/A:H

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