CVE-2017-18120

A double-free bug in the readgif function in gifread.c in gifsicle 1.90 allows a remote attacker to cause a denial-of-service attack or unspecified other impact via a maliciously crafted file, because lastname is mishandled, a different vulnerability than CVE-2017-1000421.

References

Affected packages

Git / github.com/kohler/gifsicle

Affected ranges

Type

GIT

Repo

https://github.com/kohler/gifsicle

Events

Introduced

fad477c307298ac140a2c26b01c72925f300a7a7

Last affected

fad477c307298ac140a2c26b01c72925f300a7a7

Fixed

118a46090c50829dc543179019e6140e1235f909

Database specific

{
    "cpe": "cpe:2.3:a:lcdf:gifsicle:1.90:*:*:*:*:*:*:*",
    "source": [
        "CPE_STRING",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "1.90"
        },
        {
            "last_affected": "1.90"
        }
    ]
}

Affected versions

1.*

1.90

v1.*

v1.90

Database specific

vanir_signatures

[
    {
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "40938569967824248452519032506648219435",
                "140282648014875945732110581723291858112",
                "312581299782086433331941700568154316169",
                "175509438779924551367698524329515749884"
            ]
        },
        "signature_version": "v1",
        "source": "https://github.com/kohler/gifsicle/commit/118a46090c50829dc543179019e6140e1235f909",
        "signature_type": "Line",
        "target": {
            "file": "src/gifread.c"
        },
        "id": "CVE-2017-18120-5bf08d7f",
        "deprecated": false
    },
    {
        "digest": {
            "length": 2625.0,
            "function_hash": "198277961152993239630182827096374800280"
        },
        "signature_version": "v1",
        "source": "https://github.com/kohler/gifsicle/commit/118a46090c50829dc543179019e6140e1235f909",
        "signature_type": "Function",
        "target": {
            "function": "read_gif",
            "file": "src/gifread.c"
        },
        "id": "CVE-2017-18120-ac119a30",
        "deprecated": false
    }
]

vanir_signatures_modified

"2026-07-08T15:10:56Z"

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-18120.json"