CVE-2019-18849

In tnef before 1.4.18, an attacker may be able to write to the victim's .ssh/authorized_keys file via an e-mail message with a crafted winmail.dat application/ms-tnef attachment, because of a heap-based buffer over-read involving strdup.

References

Affected packages

Git / github.com/verdammelt/tnef

Affected ranges

Type

GIT

Repo

https://github.com/verdammelt/tnef

Events

Introduced

Fixed

8edd0e046736764c6decc8cd6e0e739438408f3e

Database specific

{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "fixed": "1.4.18"
        }
    ]
}

Affected versions

1.*

1.4.10

1.4.11

1.4.12

1.4.14

1.4.15

1.4.16

1.4.17

TNEF-1.*

TNEF-1.4.10

TNEF-1.4.11

Database specific

vanir_signatures_modified

"2026-04-11T12:42:33Z"

vanir_signatures

[
    {
        "id": "CVE-2019-18849-0c99bc39",
        "signature_version": "v1",
        "signature_type": "Function",
        "source": "https://github.com/verdammelt/tnef/commit/8edd0e046736764c6decc8cd6e0e739438408f3e",
        "deprecated": false,
        "target": {
            "function": "parse_cmdline",
            "file": "src/main.c"
        },
        "digest": {
            "function_hash": "197527520806726047393812687626000968189",
            "length": 3966.0
        }
    },
    {
        "id": "CVE-2019-18849-586681cd",
        "signature_version": "v1",
        "digest": {
            "line_hashes": [
                "17390164876592905577376831902072063451",
                "109240640345055473013296847978297599553",
                "137785748995152623693204248295444430259",
                "155667681579234382799527855881423726826"
            ],
            "threshold": 0.9
        },
        "source": "https://github.com/verdammelt/tnef/commit/8edd0e046736764c6decc8cd6e0e739438408f3e",
        "deprecated": false,
        "target": {
            "file": "src/main.c"
        },
        "signature_type": "Line"
    }
]

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-18849.json"

unresolved_ranges

[
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "30"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "31"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "16.04"
            }
        ]
    },
    {
        "events": [
            {
                "introduced": "0"
            },
            {
                "last_affected": "8.0"
            }
        ]
    }
]