CVE-2016-4979

The Apache HTTP Server 2.4.18 through 2.4.20, when modhttp2 and modssl are enabled, does not properly recognize the "SSLVerifyClient require" directive for HTTP/2 request authorization, which allows remote attackers to bypass intended access restrictions by leveraging the ability to send multiple requests over a single connection and aborting a renegotiation.

References

Affected packages

Git / github.com/apache/httpd

Affected ranges

Type: GIT
Repo: https://github.com/apache/httpd
Events: Introduced

0 Unknown introduced commit / All previous commits are affected

Fixed

2d0e4eff04ea963128a41faaef21f987272e05a2

Database specific

{
    "vanir_signatures": [
        {
            "target": {
                "function": "ssl_hook_Access",
                "file": "modules/ssl/ssl_engine_kernel.c"
            },
            "signature_type": "Function",
            "id": "CVE-2016-4979-5eec88a5",
            "deprecated": false,
            "signature_version": "v1",
            "source": "https://github.com/apache/httpd/commit/2d0e4eff04ea963128a41faaef21f987272e05a2",
            "digest": {
                "function_hash": "285512666638282015489581124945252142619",
                "length": 13247.0
            }
        },
        {
            "target": {
                "file": "modules/ssl/ssl_engine_kernel.c"
            },
            "signature_type": "Line",
            "id": "CVE-2016-4979-f37c52b9",
            "deprecated": false,
            "signature_version": "v1",
            "source": "https://github.com/apache/httpd/commit/2d0e4eff04ea963128a41faaef21f987272e05a2",
            "digest": {
                "line_hashes": [
                    "244385919861610858721936967085811442209",
                    "308071227496002563137936932201529329994",
                    "158621415921638913253691990362977946518",
                    "320008290054834887054868414971497180225"
                ],
                "threshold": 0.9
            }
        }
    ]
}