cvelist/2023/6xxx/CVE-2023-6936.json

{
    "data_version": "4.0",
    "data_type": "CVE",
    "data_format": "MITRE",
    "CVE_data_meta": {
        "ID": "CVE-2023-6936",
        "ASSIGNER": "facts@wolfssl.com",
        "STATE": "PUBLIC"
    },
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "In wolfSSL prior to 5.6.6, if callback functions are enabled (via the WOLFSSL_CALLBACKS flag), then a malicious TLS client or network attacker can trigger a buffer over-read on the heap of 5 bytes (WOLFSSL_CALLBACKS is only intended for debugging).\n"
            }
        ]
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "n/a"
                    }
                ]
            }
        ]
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "vendor_name": "wolfSSL",
                    "product": {
                        "product_data": [
                            {
                                "product_name": "wolfSSL",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<=",
                                            "version_name": "0",
                                            "version_value": "5.6.5"
                                        }
                                    ]
                                }
                            }
                        ]
                    }
                }
            ]
        }
    },
    "references": {
        "reference_data": [
            {
                "url": "https://github.com/wolfSSL/wolfssl/pull/6949/",
                "refsource": "MISC",
                "name": "https://github.com/wolfSSL/wolfssl/pull/6949/"
            },
            {
                "url": "https://www.wolfssl.com/docs/security-vulnerabilities/",
                "refsource": "MISC",
                "name": "https://www.wolfssl.com/docs/security-vulnerabilities/"
            }
        ]
    },
    "generator": {
        "engine": "Vulnogram 0.1.0-dev"
    },
    "source": {
        "discovery": "EXTERNAL"
    },
    "configuration": [
        {
            "lang": "en",
            "supportingMedia": [
                {
                    "base64": false,
                    "type": "text/html",
                    "value": "To be vulnerable, wolfSSL callback functionality (which includes handshake and timeout callback functionality) must must be enabled with:<br><b><span style=\"background-color: transparent;\">CFLAGS=\"-DWOLFSSL_CALLBACKS\"</span></b><br><br>This option is disabled by default. The default configuration of wolfSSL is not vulnerable."
                }
            ],
            "value": "To be vulnerable, wolfSSL callback functionality (which includes handshake and timeout callback functionality) must must be enabled with:\nCFLAGS=\"-DWOLFSSL_CALLBACKS\"\n\nThis option is disabled by default. The default configuration of wolfSSL is not vulnerable."
        }
    ],
    "work_around": [
        {
            "lang": "en",
            "supportingMedia": [
                {
                    "base64": false,
                    "type": "text/html",
                    "value": "<li>Do not build wolfSSL with <b>WOLFSSL_CALLBACKS</b> defined</li>"
                }
            ],
            "value": "  *  Do not build wolfSSL with WOLFSSL_CALLBACKS defined\n"
        }
    ],
    "solution": [
        {
            "lang": "en",
            "supportingMedia": [
                {
                    "base64": false,
                    "type": "text/html",
                    "value": "<p><span style=\"background-color: transparent;\">The fix for this issue is located in the following GitHub Pull Request: </span><a target=\"_blank\" rel=\"nofollow\" href=\"https://github.com/wolfSSL/wolfssl/pull/6949/\">https://github.com/wolfSSL/wolfssl/pull/6949/</a></p>"
                }
            ],
            "value": "The fix for this issue is located in the following GitHub Pull Request:  https://github.com/wolfSSL/wolfssl/pull/6949/ https://github.com/wolfSSL/wolfssl/pull/6949/ \n\n"
        }
    ],
    "credits": [
        {
            "lang": "en",
            "value": "Lucca Hirschi (Inria, LORIA)"
        },
        {
            "lang": "en",
            "value": "Steve Kremer (Inria, LORIA)"
        },
        {
            "lang": "en",
            "value": "Max Ammann (Trail of Bits)"
        },
        {
            "lang": "en",
            "value": "tlspuffin"
        }
    ],
    "impact": {
        "cvss": [
            {
                "attackComplexity": "LOW",
                "attackVector": "NETWORK",
                "availabilityImpact": "NONE",
                "baseScore": 5.3,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "LOW",
                "integrityImpact": "NONE",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N",
                "version": "3.1"
            }
        ]
    }
}