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Improper authorization when accessing with third-party application

Critical
syuilo published GHSA-7pxq-6xx9-xpgm Dec 29, 2023

Package

No package listed

Affected versions

<=2023.12.0

Patched versions

2023.12.1

Description

Summary

サードパーティアプリケーションはユーザーの許可なしにkindやsecureが誤って指定されている一部のエンドポイントやWebsocket APIにアクセスし、非公開のコンテンツの読み出しや追加などの操作ができる可能性があります。これによりアプリケーションを認証したユーザーが管理者の場合、オブジェクトストレージのシークレットキーやSMTPサーバーのパスワードなどの機密情報が漏洩し、一般ユーザーに関しても招待コードを無断に作成できたり非公開のユーザー情報が漏洩したりする可能性があります。

Severity

CVSS v4.0 score: 9.3 (Critical)
Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N

CVSS v3.1 score: 9.0 (Critical)
Vector String: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

PoC

Exploit codes are available at GitHub Gist.

Timeline

Date Event
2023-12-01 @chocolate-pie discovered this vulnerability
2023-12-14 Vulnerability report submitted to misskey using github security advisory
2023-12-16 Received acknowledgement from @syuilo
2023-12-18 First patch was committed to misskey-dev/misskey by @syuilo
2023-12-27 Completely fixed this vulnerability
2023-12-29 Security advisory released to public

References

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H

CVE ID

CVE-2023-52139

Weaknesses

Credits