CVE-2020-5300— Disallow replay of `private_key_jwt` by blacklisting JTIs in Hydra
Quick assessment
Affected
ory hydra
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Hydra是一款渗透测试工具。 Hydra 1.4.0之前版本中存在安全漏洞，该漏洞源于程序没有检查‘jti’值的唯一性。攻击者可利用该漏洞重放令牌。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2020-5300
Vulnerability Information
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Vulnerability Title
Disallow replay of `private_key_jwt` by blacklisting JTIs in Hydra
Source: CVE Program / CVE List V5
Vulnerability Description
In Hydra (an OAuth2 Server and OpenID Certified™ OpenID Connect Provider written in Go), before version 1.4.0+oryOS.17, when using client authentication method 'private_key_jwt' [1], OpenId specification says the following about assertion `jti`: "A unique identifier for the token, which can be used to prevent reuse of the token. These tokens MUST only be used once, unless conditions for reuse were negotiated between the parties". Hydra does not check the uniqueness of this `jti` value. Exploiting this vulnerability is somewhat difficult because: - TLS protects against MITM which makes it difficult to intercept valid tokens for replay attacks - The expiry time of the JWT gives only a short window of opportunity where it could be replayed This has been patched in version v1.4.0+oryOS.17
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用捕获-重放进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Hydra 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Hydra是一款渗透测试工具。 Hydra 1.4.0之前版本中存在安全漏洞，该漏洞源于程序没有检查‘jti’值的唯一性。攻击者可利用该漏洞重放令牌。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2020-5300
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Patches & Fixes for CVE-2020-5300 (1)
Vendor Advisories for CVE-2020-5300 (1)
-
https://github.com/ory/hydra/security/advisories/GHSA-3p3g-vpw6-4w66 x_refsource_CONFIRM
Other References for CVE-2020-5300 (1)
-
https://github.com/ory/hydra/releases/tag/v1.4.0 x_refsource_MISC
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V. Comments for CVE-2020-5300
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