CVE-2018-20843

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Source
https://cve.org/CVERecord?id=CVE-2018-20843
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20843.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2018-20843
Downstream
Related
Published
2019-06-24T17:15:09.980Z
Modified
2026-06-18T04:04:24.508010113Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In libexpat in Expat before 2.2.7, XML input including XML names that contain a large number of colons could make the XML parser consume a high amount of RAM and CPU resources while processing (enough to be usable for denial-of-service attacks).

Database specific 
{
    "unresolved_ranges": [
        {
            "cpes": [
                "cpe:2.3:a:oracle:hospitality_res_3700:*:*:*:*:*:*:*:*"
            ],
            "source": "CPE_RANGE",
            "extracted_events": [
                {
                    "introduced": "5.7"
                },
                {
                    "last_affected": "5.7.6"
                }
            ],
            "vendor_product": "oracle:hospitality_res_3700"
        },
        {
            "cpes": [
                "cpe:2.3:a:tenable:nessus:*:*:*:*:*:*:*:*"
            ],
            "source": "CPE_RANGE",
            "extracted_events": [
                {
                    "fixed": "8.15.0"
                }
            ],
            "vendor_product": "tenable:nessus"
        },
        {
            "cpes": [
                "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:esm:*:*:*",
                "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:*:*:*:*:*:*:*",
                "cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*"
            ],
            "source": "CPE_STRING",
            "extracted_events": [
                {
                    "last_affected": "12.04"
                },
                {
                    "last_affected": "14.04"
                },
                {
                    "last_affected": "16.04"
                },
                {
                    "last_affected": "18.04"
                },
                {
                    "last_affected": "18.10"
                },
                {
                    "last_affected": "19.04"
                }
            ],
            "vendor_product": "canonical:ubuntu_linux"
        },
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "last_affected": "8.0"
                },
                {
                    "last_affected": "9.0"
                }
            ],
            "vendor_product": "debian:debian_linux"
        },
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*",
                "cpe:2.3:o:fedoraproject:fedora:30:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "last_affected": "29"
                },
                {
                    "last_affected": "30"
                }
            ],
            "vendor_product": "fedoraproject:fedora"
        },
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*",
                "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "last_affected": "15.0"
                },
                {
                    "last_affected": "15.1"
                }
            ],
            "vendor_product": "opensuse:leap"
        },
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:a:oracle:http_server:12.1.3.0:*:*:*:*:*:*:*",
                "cpe:2.3:a:oracle:http_server:12.2.1.4.0:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "last_affected": "12.1.3.0"
                },
                {
                    "last_affected": "12.2.1.4.0"
                }
            ],
            "vendor_product": "oracle:http_server"
        },
        {
            "source": "CPE_STRING",
            "cpes": [
                "cpe:2.3:a:oracle:outside_in_technology:8.5.4:*:*:*:*:*:*:*",
                "cpe:2.3:a:oracle:outside_in_technology:8.5.5:*:*:*:*:*:*:*"
            ],
            "extracted_events": [
                {
                    "last_affected": "8.5.4"
                },
                {
                    "last_affected": "8.5.5"
                }
            ],
            "vendor_product": "oracle:outside_in_technology"
        }
    ]
}
References

Affected packages

Git / github.com/libexpat/libexpat

Affected ranges

Type
GIT
Repo
https://github.com/libexpat/libexpat
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
d3b78b42a2dcdea98e22625cfff67a49d47e6025
Database specific 
{
    "source": "CPE_RANGE",
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "2.2.7"
        }
    ],
    "cpe": "cpe:2.3:a:libexpat_project:libexpat:*:*:*:*:*:*:*:*"
}

Affected versions

Other
REC1_0
R_1_95_0
R_1_95_2
R_1_95_3
R_1_95_4
R_1_95_5
R_1_95_6
R_1_95_7
R_1_95_8
R_2_0_0
R_2_0_1
R_2_1_0
R_2_1_1
R_2_2_0
R_2_2_1
R_2_2_2
R_2_2_3
R_2_2_4
R_2_2_5
R_2_2_6
V1990307
V19981122
V19981231
V19990109
V19990425
V19990626
V19990709
V19990728
V19991013
V1_0
V1_1
V20000512
beta2
beta3
beta4
jclark-orig
libexpat-alpha-1
sourceforge_init
start

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-20843.json"