CVE-2017-6420

The wwunpack function in libclamav/wwunpack.c in ClamAV 0.99.2 allows remote attackers to cause a denial of service (use-after-free) via a crafted PE file with WWPack compression.

References

Affected packages

Git / github.com/cisco-talos/clamav

Affected ranges

Type

GIT

Repo

https://github.com/cisco-talos/clamav

Events

Introduced

5ceae552829ee65c9ecff8ff303b1f2ddfd11576

Last affected

5ceae552829ee65c9ecff8ff303b1f2ddfd11576

Fixed

dfc00cd3301a42b571454b51a6102eecf58407bc

Database specific

{
    "cpe": "cpe:2.3:a:clamav:clamav:0.99.2:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0.99.2"
        },
        {
            "last_affected": "0.99.2"
        }
    ],
    "source": [
        "CPE_STRING",
        "REFERENCES"
    ]
}

Affected versions

0.*

0.99.2

clamav-0.*

clamav-0.99.2

Database specific

vanir_signatures

[
    {
        "source": "https://github.com/cisco-talos/clamav/commit/dfc00cd3301a42b571454b51a6102eecf58407bc",
        "signature_version": "v1",
        "signature_type": "Function",
        "digest": {
            "function_hash": "139298605883294768074466177189333198170",
            "length": 3832.0
        },
        "deprecated": false,
        "id": "CVE-2017-6420-8db5ad48",
        "target": {
            "function": "wwunpack",
            "file": "libclamav/wwunpack.c"
        }
    },
    {
        "source": "https://github.com/cisco-talos/clamav/commit/dfc00cd3301a42b571454b51a6102eecf58407bc",
        "signature_version": "v1",
        "signature_type": "Line",
        "digest": {
            "line_hashes": [
                "35527508808006729459757378903195264297",
                "136599601490254595440116583910458001390",
                "213343516002541788284701737169634229176",
                "38984029225980571671566102348353921465"
            ],
            "threshold": 0.9
        },
        "deprecated": false,
        "id": "CVE-2017-6420-c120f9f5",
        "target": {
            "file": "libclamav/wwunpack.c"
        }
    }
]

vanir_signatures_modified

"2026-07-08T16:53:12Z"

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-6420.json"