cvelist/2021/3xxx/CVE-2021-3725.json

{
    "CVE_data_meta": {
        "ASSIGNER": "security@huntr.dev",
        "ID": "CVE-2021-3725",
        "STATE": "PUBLIC",
        "TITLE": "OS Command Injection in ohmyzsh/ohmyzsh"
    },
    "affects": {
        "vendor": {
            "vendor_data": [
                {
                    "product": {
                        "product_data": [
                            {
                                "product_name": "ohmyzsh/ohmyzsh",
                                "version": {
                                    "version_data": [
                                        {
                                            "version_affected": "<",
                                            "version_value": "06fc5fb"
                                        }
                                    ]
                                }
                            }
                        ]
                    },
                    "vendor_name": "ohmyzsh"
                }
            ]
        }
    },
    "data_format": "MITRE",
    "data_type": "CVE",
    "data_version": "4.0",
    "description": {
        "description_data": [
            {
                "lang": "eng",
                "value": "Vulnerability in dirhistory plugin Description: the widgets that go back and forward in the directory history, triggered by pressing Alt-Left and Alt-Right, use functions that unsafely execute eval on directory names. If you cd into a directory with a carefully-crafted name, then press Alt-Left, the system is subject to command injection. Impacted areas: - Functions pop_past and pop_future in dirhistory plugin."
            }
        ]
    },
    "exploit": [
        {
            "lang": "eng",
            "value": "Exploit PoC:\n\n1. Install Oh My Zsh.\n2. Enable the dirhistory plugin.\n3. Open a terminal and create and cd into a directory like so:\n\n   baddir=\"directory';id;echo 'pwned\"\n   mkdir \"$baddir\" && cd \"$baddir\"\n\n4. Press Alt-Left to go back to previous directory (in macOS, use Option-Left).\n\n5. id and echo pwned are executed:\n\n   $ <Alt-Left>\n   uid=1000(user) gid=1000(user) groups=1000(user),4(adm),24(cdrom),27(sudo),...\n   pwned"
        }
    ],
    "impact": {
        "cvss": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H",
            "version": "3.1"
        }
    },
    "problemtype": {
        "problemtype_data": [
            {
                "description": [
                    {
                        "lang": "eng",
                        "value": "CWE-78 OS Command Injection"
                    }
                ]
            }
        ]
    },
    "references": {
        "reference_data": [
            {
                "name": "https://github.com/ohmyzsh/ohmyzsh/commit/06fc5fb",
                "refsource": "MISC",
                "url": "https://github.com/ohmyzsh/ohmyzsh/commit/06fc5fb"
            }
        ]
    }
}