stunnel における証明書検証に関する脆弱性
| Title |
stunnel における証明書検証に関する脆弱性
|
| Summary |
stunnel には、証明書検証に関する脆弱性が存在します。
|
| Possible impacts |
情報を取得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 |
Feb. 4, 2021, midnight |
| Registration Date |
Nov. 9, 2021, 5:07 p.m. |
| Last Update |
Nov. 9, 2021, 5:07 p.m. |
|
CVSS3.0 : 重要
|
| Score |
7.5
|
| Vector |
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
|
CVSS2.0 : 警告
|
| Score |
5
|
| Vector |
AV:N/AC:L/Au:N/C:P/I:N/A:N |
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
その他
Change Log
| No |
Changed Details |
Date of change |
| 1 |
[2021年11月09日]
掲載 |
Nov. 9, 2021, 5:07 p.m. |
NVD Vulnerability Information
CVE-2021-20230
| Summary |
A flaw was found in stunnel before 5.57, where it improperly validates client certificates when it is configured to use both redirect and verifyChain options. This flaw allows an attacker with a certificate signed by a Certificate Authority, which is not the one accepted by the stunnel server, to access the tunneled service instead of being redirected to the address specified in the redirect option. The highest threat from this vulnerability is to confidentiality.
|
| Publication Date |
Feb. 24, 2021, 2:15 a.m. |
| Registration Date |
Feb. 24, 2021, 10:01 a.m. |
| Last Update |
Nov. 21, 2024, 2:46 p.m. |
Affected software configurations
| Configuration1 |
or higher |
or less |
more than |
less than |
| cpe:2.3:a:stunnel:stunnel:*:*:*:*:*:*:*:* |
|
|
|
5.57 |
Related information, measures and tools
Common Vulnerabilities List