CVE-2023-28857

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Source
https://nvd.nist.gov/vuln/detail/CVE-2023-28857
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2023-28857.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2023-28857
Aliases
Published
2023-06-27T17:10:47.930Z
Modified
2025-12-02T23:57:31.866010Z
Severity
  • 4.0 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N CVSS Calculator
Summary
LDAP password leak in Apereo CAS - GHSL-2023-009
Details

Apereo CAS is an open source multilingual single sign-on solution for the web. Apereo CAS can be configured to use authentication based on client X509 certificates. These certificates can be provided via TLS handshake or a special HTTP header, such as “sslclientcert”. When checking the validity of the provided client certificate, X509CredentialsAuthenticationHandler performs check that this certificate is not revoked. To do so, it fetches URLs provided in the “CRL Distribution Points” extension of the certificate, which are taken from the certificate itself and therefore can be controlled by a malicious user. If the CAS server is configured to use an LDAP server for x509 authentication with a password, for example by setting a “cas.authn.x509.ldap.ldap-url” and “cas.authn.x509.ldap.bind-credential” properties, X509CredentialsAuthenticationHandler fetches revocation URLs from the certificate, which can be LDAP urls. When making requests to this LDAP urls, Apereo CAS uses the same password as for initially configured LDAP server, which can lead to a password leak. An unauthenticated user can leak the password used to LDAP connection configured on server. This issue has been addressed in version 6.6.6. Users are advised to upgrade. There are no known workarounds for this vulnerability.

Database specific 
{
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-200"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/28xxx/CVE-2023-28857.json"
}
References

Affected packages

Git / github.com/apereo/cas

Affected ranges

Type
GIT
Repo
https://github.com/apereo/cas
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
adee006544f6e82d43606ff0512b8d93853da3d6

Affected versions

3.*

3.4.11-RC1

6.*

6.3.0-RC1

v3.*

v3.4.11
v3.5.0
v3.5.0-RC1
v3.5.0-RC2
v3.5.1
v3.5.1-RC1

v4.*

v4.0.0-RC1

v6.*

v6.1.0-RC5
v6.1.0-RC6
v6.2.0-RC1
v6.2.0-RC2
v6.2.0-RC3
v6.2.0-RC4
v6.2.0-RC5
v6.3.0-RC2
v6.3.0-RC3
v6.3.0-RC4
v6.3.0-RC5
v6.4.0-RC1
v6.4.0-RC2
v6.4.0-RC3
v6.4.0-RC4
v6.4.0-RC5
v6.4.0-RC6
v6.5.0-RC1
v6.5.0-RC2
v6.5.0-RC3
v6.5.0-RC4
v6.5.0-RC5
v6.6.0
v6.6.0-RC1
v6.6.0-RC2
v6.6.0-RC3
v6.6.0-RC4
v6.6.0-RC5
v6.6.1
v6.6.2
v6.6.3
v6.6.4
v6.6.5

Database specific

vanir_signatures

[
    {
        "signature_version": "v1",
        "signature_type": "Line",
        "id": "CVE-2023-28857-4ff42509",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "264961458287417714707294800830550887983",
                "105109564877415067348130269570313055837",
                "21993627550315214828746452553276050420",
                "139643187003259681287323476306782309703"
            ]
        },
        "target": {
            "file": "support/cas-server-support-x509-core/src/main/java/org/apereo/cas/adaptors/x509/authentication/ldap/LdaptiveResourceCRLFetcher.java"
        },
        "source": "https://github.com/apereo/cas/commit/adee006544f6e82d43606ff0512b8d93853da3d6"
    },
    {
        "signature_version": "v1",
        "signature_type": "Function",
        "id": "CVE-2023-28857-89dd0f0e",
        "deprecated": false,
        "digest": {
            "function_hash": "282329613634731693422757852303318082076",
            "length": 167.0
        },
        "target": {
            "function": "prepareConnectionFactory",
            "file": "support/cas-server-support-x509-core/src/main/java/org/apereo/cas/adaptors/x509/authentication/ldap/LdaptiveResourceCRLFetcher.java"
        },
        "source": "https://github.com/apereo/cas/commit/adee006544f6e82d43606ff0512b8d93853da3d6"
    }
]

Git / github.com/jasig/cas

Affected ranges

Type
GIT
Repo
https://github.com/jasig/cas
Events
Introduced
e1e6e653906ddcaa6f9ab62064bfee379f966d11
Fixed
ac34a21fbb515307bdcd749bd0901c8e41ff4964

Database specific

vanir_signatures

[
    {
        "signature_version": "v1",
        "signature_type": "Line",
        "id": "CVE-2023-28857-0112d97e",
        "deprecated": false,
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "264961458287417714707294800830550887983",
                "105109564877415067348130269570313055837",
                "21993627550315214828746452553276050420",
                "139643187003259681287323476306782309703"
            ]
        },
        "target": {
            "file": "support/cas-server-support-x509-core/src/main/java/org/apereo/cas/adaptors/x509/authentication/ldap/LdaptiveResourceCRLFetcher.java"
        },
        "source": "https://github.com/jasig/cas/commit/ac34a21fbb515307bdcd749bd0901c8e41ff4964"
    },
    {
        "signature_version": "v1",
        "signature_type": "Function",
        "id": "CVE-2023-28857-3bc8ecb5",
        "deprecated": false,
        "digest": {
            "function_hash": "282329613634731693422757852303318082076",
            "length": 167.0
        },
        "target": {
            "function": "prepareConnectionFactory",
            "file": "support/cas-server-support-x509-core/src/main/java/org/apereo/cas/adaptors/x509/authentication/ldap/LdaptiveResourceCRLFetcher.java"
        },
        "source": "https://github.com/jasig/cas/commit/ac34a21fbb515307bdcd749bd0901c8e41ff4964"
    }
]