{
    "id": "CVE-2018-19518",
    "published": "2018-11-25 10:29:00",
    "last_modified": "2026-06-17 01:49:25",
    "cvss_score": "7.5",
    "cvss_severity": "HIGH",
    "cvss_version": "3.1",
    "cvss_vector": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
    "cwe": "CWE-88",
    "description": "University of Washington IMAP Toolkit 2007f on UNIX, as used in imap_open() in PHP and other products, launches an rsh command (by means of the imap_rimap function in c-client/imap4r1.c and the tcp_aopen function in osdep/unix/tcp_unix.c) without preventing argument injection, which might allow remote attackers to execute arbitrary OS commands if the IMAP server name is untrusted input (e.g., entered by a user of a web application) and if rsh has been replaced by a program with different argument semantics. For example, if rsh is a link to ssh (as seen on Debian and Ubuntu systems), then the attack can use an IMAP server name containing a \"-oProxyCommand\" argument.",
    "epss_score": "0.96107",
    "epss_percentile": "0.99876",
    "kev": 0,
    "kev_due": null,
    "has_exploit": 1,
    "updated_at": "2026-09-26 18:23:33",
    "priority": {
        "rank": 2,
        "label": "Patch early",
        "why": "A public exploit exists."
    },
    "products": [
        {
            "vendor": "canonical",
            "product": "ubuntu_linux"
        },
        {
            "vendor": "debian",
            "product": "debian_linux"
        },
        {
            "vendor": "php",
            "product": "php"
        },
        {
            "vendor": "uw-imap_project",
            "product": "uw-imap"
        }
    ],
    "kev_detail": null,
    "exploits": [
        {
            "source": "exploit-db",
            "ref_id": "45914",
            "title": "PHP imap_open - Remote Code Execution (Metasploit)",
            "date": "2018-11-29",
            "url": "https://www.exploit-db.com/exploits/45914"
        }
    ],
    "refs_list": [
        "http://www.securityfocus.com/bid/106018",
        "http://www.securitytracker.com/id/1042157",
        "https://antichat.com/threads/463395/#post-4254681",
        "https://bugs.debian.org/913775",
        "https://bugs.debian.org/913835",
        "https://bugs.debian.org/913836",
        "https://bugs.php.net/bug.php?id=76428",
        "https://bugs.php.net/bug.php?id=77153",
        "https://bugs.php.net/bug.php?id=77160",
        "https://git.php.net/?p=php-src.git%3Ba=commit%3Bh=e5bfea64c81ae34816479bb05d17cdffe45adddb",
        "https://github.com/Bo0oM/PHP_imap_open_exploit/blob/master/exploit.php",
        "https://lists.debian.org/debian-lts-announce/2018/12/msg00006.html",
        "https://lists.debian.org/debian-lts-announce/2019/03/msg00001.html",
        "https://lists.debian.org/debian-lts-announce/2021/12/msg00031.html",
        "https://security.gentoo.org/glsa/202003-57",
        "https://security.netapp.com/advisory/ntap-20181221-0004/",
        "https://usn.ubuntu.com/4160-1/",
        "https://www.debian.org/security/2018/dsa-4353",
        "https://www.exploit-db.com/exploits/45914/",
        "https://www.openwall.com/lists/oss-security/2018/11/22/3",
        "http://www.securityfocus.com/bid/106018",
        "http://www.securitytracker.com/id/1042157",
        "https://antichat.com/threads/463395/#post-4254681",
        "https://bugs.debian.org/913775",
        "https://bugs.debian.org/913835"
    ]
}