CVE-2018-20546

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Source
https://cve.org/CVERecord?id=CVE-2018-20546
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20546.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2018-20546
Downstream
Related
Published
2018-12-28T16:29:04.893Z
Modified
2026-07-08T19:45:18.969434Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H CVSS Calculator
Summary
[none]
Details

There is an illegal READ memory access at caca/dither.c (function getrgbadefault) in libcaca 0.99.beta19 for the default bpp case.

Database specific 
{
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "introduced": "12.04"
                },
                {
                    "last_affected": "12.04"
                },
                {
                    "introduced": "14.04"
                },
                {
                    "last_affected": "14.04"
                },
                {
                    "introduced": "16.04"
                },
                {
                    "last_affected": "16.04"
                },
                {
                    "introduced": "18.04"
                },
                {
                    "last_affected": "18.04"
                },
                {
                    "introduced": "18.10"
                },
                {
                    "last_affected": "18.10"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "canonical:ubuntu_linux",
            "cpes": [
                "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:esm:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*"
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "8.0"
                },
                {
                    "last_affected": "8.0"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "debian:debian_linux",
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*"
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "34"
                },
                {
                    "last_affected": "34"
                },
                {
                    "introduced": "35"
                },
                {
                    "last_affected": "35"
                },
                {
                    "introduced": "36"
                },
                {
                    "last_affected": "36"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "fedoraproject:fedora",
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*"
            ]
        },
        {
            "extracted_events": [
                {
                    "introduced": "15.0"
                },
                {
                    "last_affected": "15.0"
                }
            ],
            "source": "CPE_STRING",
            "vendor_product": "opensuse:leap",
            "cpes": [
                "cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*"
            ]
        }
    ]
}
References

Affected packages

Git / github.com/cacalabs/libcaca

Affected ranges

Type
GIT
Repo
https://github.com/cacalabs/libcaca
Events
Introduced
caae67dce5d72ceceac79468bed47b58ea8e4a29
Last affected
caae67dce5d72ceceac79468bed47b58ea8e4a29
Fixed
1022d97496c7899e8641515af363381b31ae2f05
Database specific 
{
    "source": [
        "CPE_STRING",
        "REFERENCES"
    ],
    "cpe": "cpe:2.3:a:libcaca_project:libcaca:0.99:beta19:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "0.99-beta19"
        },
        {
            "last_affected": "0.99-beta19"
        }
    ]
}

Affected versions

0.*
0.99-beta19
v0.*
v0.99.beta19

Database specific

vanir_signatures_modified 
"2026-07-08T19:45:18Z"
source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2018-20546.json"
vanir_signatures 
[
    {
        "id": "CVE-2018-20546-16db8665",
        "digest": {
            "line_hashes": [
                "173697194705099104683245377240136433543",
                "127033609259635894559715003375059074023",
                "249858520968027005030518387805073278911",
                "278457499550985249528788813404705222476",
                "26662475878361700816840939041688976160"
            ],
            "threshold": 0.9
        },
        "signature_version": "v1",
        "signature_type": "Line",
        "source": "https://github.com/cacalabs/libcaca/commit/1022d97496c7899e8641515af363381b31ae2f05",
        "deprecated": false,
        "target": {
            "file": "caca/dither.c"
        }
    }
]