CVE-2021-22861
| Summary |
An improper access control vulnerability was identified in GitHub Enterprise Server that allowed authenticated users of the instance to gain write access to unauthorized repositories via specifically crafted pull requests and REST API requests. An attacker would need to be able to fork the targeted repository, a setting that is disabled by default for organization owned private repositories. Branch protections such as required pull request reviews or status checks would prevent unauthorized commits from being merged without further review or validation. This vulnerability affected all versions of GitHub Enterprise Server since 2.4.21 and was fixed in versions 2.20.24, 2.21.15, 2.22.7 and 3.0.1. This vulnerability was reported via the GitHub Bug Bounty program.
|
| Publication Date |
March 3, 2021, 1:15 p.m. |
| Registration Date |
March 3, 2021, 4:02 p.m. |
| Last Update |
Nov. 21, 2024, 2:50 p.m. |
|
CVSS3.1 : MEDIUM
|
| スコア |
6.5
|
| Vector |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃に必要な特権レベル(PR) |
低 |
| 利用者の関与(UI) |
不要 |
| 影響の想定範囲(S) |
変更なし |
| 機密性への影響(C) |
なし |
| 完全性への影響(I) |
高 |
| 可用性への影響(A) |
なし |
|
CVSS2.0 : MEDIUM
|
| Score |
4.0
|
| Vector |
AV:N/AC:L/Au:S/C:N/I:P/A:N |
| 攻撃元区分(AV) |
ネットワーク |
| 攻撃条件の複雑さ(AC) |
低 |
| 攻撃前の認証要否(Au) |
単一 |
| 機密性への影響(C) |
なし |
| 完全性への影響(I) |
低 |
| 可用性への影響(A) |
なし |
| Get all privileges. |
いいえ
|
| Get user privileges |
いいえ
|
| Get other privileges |
いいえ
|
| User operation required |
いいえ
|
Affected software configurations
| Configuration1 |
or higher |
or less |
more than |
less than |
| cpe:2.3:a:github:github:*:*:*:*:enterprise:*:*:* |
2.22.0 |
|
|
2.22.7 |
| cpe:2.3:a:github:github:*:*:*:*:enterprise:*:*:* |
2.21.0 |
|
|
2.21.15 |
| cpe:2.3:a:github:github:*:*:*:*:*:*:*:* |
3.0.0 |
|
|
3.0.1 |
| cpe:2.3:a:github:github:*:*:*:*:enterprise:*:*:* |
2.4.21 |
|
|
2.20.24 |
Related information, measures and tools
Common Vulnerabilities List
JVN Vulnerability Information
GitHub Enterprise Server における不正な認証に関する脆弱性
| Title |
GitHub Enterprise Server における不正な認証に関する脆弱性
|
| Summary |
GitHub Enterprise Server には、不正な認証に関する脆弱性が存在します。
|
| Possible impacts |
情報を改ざんされる可能性があります。 |
| Solution |
ベンダより正式な対策が公開されています。ベンダ情報を参照して適切な対策を実施してください。 |
| Publication Date |
March 1, 2021, midnight |
| Registration Date |
Nov. 10, 2021, 11:12 a.m. |
| Last Update |
Nov. 10, 2021, 11:12 a.m. |
Affected System
CVE (情報セキュリティ 共通脆弱性識別子)
CWE (共通脆弱性タイプ一覧)
ベンダー情報
Change Log
| No |
Changed Details |
Date of change |
| 1 |
[2021年11月10日]
掲載 |
Nov. 10, 2021, 11:12 a.m. |