CVE-2017-6420

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Source
https://cve.org/CVERecord?id=CVE-2017-6420
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-6420.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2017-6420
Downstream
Related
Published
2017-08-07T03:29:00.307Z
Modified
2026-04-16T06:20:00.952096200Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

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
0 Unknown introduced commit / All previous commits are affected
Last affected
5ceae552829ee65c9ecff8ff303b1f2ddfd11576
Fixed
dfc00cd3301a42b571454b51a6102eecf58407bc
Database specific 
{
    "versions": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.99.2"
        }
    ]
}

Affected versions

clamav-0.*
clamav-0.96
clamav-0.96.2
clamav-0.96.3
clamav-0.96.4
clamav-0.96.5
clamav-0.96rc1
clamav-0.96rc2
clamav-0.97
clamav-0.97rc
clamav-0.99.2
Other
merge-llvm-97877
r5076

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2017-6420.json"
vanir_signatures 
[
    {
        "source": "https://github.com/cisco-talos/clamav/commit/dfc00cd3301a42b571454b51a6102eecf58407bc",
        "target": {
            "function": "wwunpack",
            "file": "libclamav/wwunpack.c"
        },
        "deprecated": false,
        "digest": {
            "length": 3832.0,
            "function_hash": "139298605883294768074466177189333198170"
        },
        "signature_type": "Function",
        "id": "CVE-2017-6420-8db5ad48",
        "signature_version": "v1"
    },
    {
        "source": "https://github.com/cisco-talos/clamav/commit/dfc00cd3301a42b571454b51a6102eecf58407bc",
        "target": {
            "file": "libclamav/wwunpack.c"
        },
        "signature_version": "v1",
        "deprecated": false,
        "signature_type": "Line",
        "digest": {
            "threshold": 0.9,
            "line_hashes": [
                "35527508808006729459757378903195264297",
                "136599601490254595440116583910458001390",
                "213343516002541788284701737169634229176",
                "38984029225980571671566102348353921465"
            ]
        },
        "id": "CVE-2017-6420-c120f9f5"
    }
]
vanir_signatures_modified 
"2026-04-11T04:14:38Z"