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disallow sub-credentials based on root credentials to gain priviledges (#12947)

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This happens because of a change added where any sub-credential
with parentUser == rootCredential i.e (MINIO_ROOT_USER) will
always be an owner, you cannot generate credentials with lower
session policy to restrict their access.

This doesn't affect user service accounts created with regular
users, LDAP or OpenID
This commit is contained in:
Harshavardhana
2021-08-12 18:07:08 -07:00
committed by GitHub
parent 89febdb3d6
commit 8f2a3efa85
10 changed files with 70 additions and 135 deletions
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7
cmd/signature-v4.go
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@@ -181,7 +181,8 @@ func doesPolicySignatureV4Match(formValues http.Header) (auth.Credentials, APIEr
return auth.Credentials{}, s3Err
}
cred, _, s3Err := checkKeyValid(credHeader.accessKey)
r := &http.Request{Header: formValues}
cred, _, s3Err := checkKeyValid(r, credHeader.accessKey)
if s3Err != ErrNone {
return cred, s3Err
}
@@ -214,7 +215,7 @@ func doesPresignedSignatureMatch(hashedPayload string, r *http.Request, region s
return err
}
cred, _, s3Err := checkKeyValid(pSignValues.Credential.accessKey)
cred, _, s3Err := checkKeyValid(r, pSignValues.Credential.accessKey)
if s3Err != ErrNone {
return s3Err
}
@@ -349,7 +350,7 @@ func doesSignatureMatch(hashedPayload string, r *http.Request, region string, st
return errCode
}
cred, _, s3Err := checkKeyValid(signV4Values.Credential.accessKey)
cred, _, s3Err := checkKeyValid(r, signV4Values.Credential.accessKey)
if s3Err != ErrNone {
return s3Err
}