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[email protected]CVE-2021-26074

HistoryApr 16, 2021 - 3:15 a.m.

CVE-2021-26074

2021-04-1603:15:12

CWE-287

[email protected]

web.nvd.nist.gov

cve

2021

26074

broken authentication

atlassian connect spring boot

acsb

java

spring boot

security vulnerability

authentication issue

jwt

nvd

4 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:S/C:N/I:P/A:N

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

22.9%

JSON

Broken Authentication in Atlassian Connect Spring Boot (ACSB) from version 1.1.0 before version 2.1.3: Atlassian Connect Spring Boot is a Java Spring Boot package for building Atlassian Connect apps. Authentication between Atlassian products and the Atlassian Connect Spring Boot app occurs with a server-to-server JWT or a context JWT. Atlassian Connect Spring Boot versions from version 1.1.0 before version 2.1.3 erroneously accept context JWTs in lifecycle endpoints (such as installation) where only server-to-server JWTs should be accepted, permitting an attacker to send authenticated re-installation events to an app.

Affected configurations

NVD

Node

atlassianconnect_spring_bootRange1.1.0–2.1.3

CPENameOperatorVersion
atlassian:connect_spring_bootatlassian connect spring bootlt2.1.3

CPE	Name	Operator	Version
atlassian:connect_spring_boot	atlassian connect spring boot	lt	2.1.3

CNA Affected

[
  {
    "product": "Atlassian Connect Spring Boot (ACSB)",
    "vendor": "Atlassian",
    "versions": [
      {
        "lessThan": "unspecified",
        "status": "affected",
        "version": "1.1.0",
        "versionType": "custom"
      },
      {
        "lessThan": "2.1.3",
        "status": "affected",
        "version": "unspecified",
        "versionType": "custom"
      }
    ]
  }
]

References

community.developer.atlassian.com/t/action-required-atlassian-connect-vulnerability-allows-bypass-of-app-qsh-verification-via-context-jwts/47072

confluence.atlassian.com/pages/viewpage.action?pageId=1051986106

Social References

4 Medium

CVSS2

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

SINGLE

Confidentiality Impact

NONE

Integrity Impact

PARTIAL

Availability Impact

NONE

AV:N/AC:L/Au:S/C:N/I:P/A:N

6.5 Medium

CVSS3

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

HIGH

Availability Impact

NONE

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

0.001 Low

EPSS

Percentile

22.9%

JSON

Related for CVE-2021-26074

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