expat, sitecopy and 2 more products — security advisory
The XML parser in Expat does not use sufficient entropy for hash initialization, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted identifiers in an XML document. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-0876.
- Products
- expat, sitecopy, vnc4, xmlrpc-c
- Affected versions
- 1.16.33-3.2ubuntu3, 1.33.06-0ubuntu1, 1.33.06-0ubuntu1+esm1, 1.33.14-0.2ubuntu3, 1.33.14-10, 1.33.14-10ubuntu0.1~esm1, 1.33.14-11, 1.33.14-11.1, 1.33.14-12, 1.33.14-12build1, 1.33.14-12build2, 1.33.14-12ubuntu0.1~esm1, 1.33.14-1ubuntu1, 1.33.14-1ubuntu1+esm1, 1.33.14-7, 1.33.14-8, 1.33.14-8build1, 1.33.14-8build2, 1.33.14-8ubuntu0.18.04.1~esm1, 1.33.14-8ubuntu0.20.04.1~esm1, 1.33.14-9, 1.59.03-10, 1.59.03-10.1, 1.59.03-7, 1.59.03-9, 1.60.05-1, 1.60.05-1build1, 1:0.16.6-16, 1:0.16.6-16build1, 2.1.0-4, 2.1.0-4ubuntu1, 2.1.0-4ubuntu1.1, 2.1.0-4ubuntu1.2, 2.1.0-7, 2.1.0-7ubuntu0.16.04.1, 4.1.1+xorg4.3.0-37.3ubuntu2, 4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1, 4.1.1+xorg4.3.0-37ubuntu5, 4.1.1+xorg4.3.0-37ubuntu5.0.1, 4.1.1+xorg4.3.0-37ubuntu5.0.2, 4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1
- Fixed versions
- 2.1.0-4ubuntu1.3, 2.1.0-7ubuntu0.16.04.2
- CVEs
- CVE-2016-5300
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:20 UTC · Revision 1
Source evidence
The XML parser in Expat does not use sufficient entropy for hash initialization, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted identifiers in an XML document. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-0876.
osv:UBUNTU-CVE-2016-5300
expat
Fixed versions: 2.1.0-4ubuntu1.3
vnc4
Fixed versions: Not specified
xmlrpc-c
Fixed versions: Not specified
expat
Fixed versions: 2.1.0-7ubuntu0.16.04.2
vnc4
Fixed versions: Not specified
xmlrpc-c
Fixed versions: Not specified
vnc4
Fixed versions: Not specified
xmlrpc-c
Fixed versions: Not specified
xmlrpc-c
Fixed versions: Not specified
xmlrpc-c
Fixed versions: Not specified
xmlrpc-c
Fixed versions: Not specified
sitecopy
Fixed versions: Not specified
xmlrpc-c
Fixed versions: Not specified
sitecopy
Fixed versions: Not specified
xmlrpc-c
Fixed versions: Not specified
sitecopy
Fixed versions: Not specified
xmlrpc-c
Fixed versions: Not specified
Complete source record
{
"id": "1a7830e0186ae003168b5661c796e7641d87fb71b31b28f375892fc3b73c5fed",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2016-5300",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2016-5300",
"summary": "The XML parser in Expat does not use sufficient entropy for hash initialization, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted identifiers in an XML document. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-0876.",
"evidence": "osv:UBUNTU-CVE-2016-5300",
"products": [
{
"name": {
"value": "expat",
"evidence": "/affected/0/package/name"
},
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"fixed_versions": [
{
"value": "2.1.0-4ubuntu1.3",
"evidence": "/affected/0/ranges"
}
],
"affected_versions": [
{
"value": "2.1.0-4",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.0-4ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "2.1.0-4ubuntu1.1",
"evidence": "/affected/0/versions"
},
{
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"evidence": "/affected/0/versions"
}
]
},
{
"name": {
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"evidence": "/affected/1/package/name"
},
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"affected_versions": [
{
"value": "4.1.1+xorg4.3.0-37ubuntu5",
"evidence": "/affected/1/versions"
},
{
"value": "4.1.1+xorg4.3.0-37ubuntu5.0.1",
"evidence": "/affected/1/versions"
},
{
"value": "4.1.1+xorg4.3.0-37ubuntu5.0.2",
"evidence": "/affected/1/versions"
},
{
"value": "4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "xmlrpc-c",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.16.33-3.2ubuntu3",
"evidence": "/affected/2/versions"
},
{
"value": "1.33.06-0ubuntu1",
"evidence": "/affected/2/versions"
},
{
"value": "1.33.06-0ubuntu1+esm1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
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"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.1.0-7ubuntu0.16.04.2",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "2.1.0-7",
"evidence": "/affected/3/versions"
},
{
"value": "2.1.0-7ubuntu0.16.04.1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "vnc4",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.1.1+xorg4.3.0-37.3ubuntu2",
"evidence": "/affected/4/versions"
},
{
"value": "4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "xmlrpc-c",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.33.14-0.2ubuntu3",
"evidence": "/affected/5/versions"
},
{
"value": "1.33.14-1ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "1.33.14-1ubuntu1+esm1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "vnc4",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "4.1.1+xorg4.3.0-37.3ubuntu2",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "xmlrpc-c",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.33.14-7",
"evidence": "/affected/7/versions"
},
{
"value": "1.33.14-8",
"evidence": "/affected/7/versions"
},
{
"value": "1.33.14-8build1",
"evidence": "/affected/7/versions"
},
{
"value": "1.33.14-8ubuntu0.18.04.1~esm1",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "xmlrpc-c",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.33.14-8build1",
"evidence": "/affected/8/versions"
},
{
"value": "1.33.14-8build2",
"evidence": "/affected/8/versions"
},
{
"value": "1.33.14-8ubuntu0.20.04.1~esm1",
"evidence": "/affected/8/versions"
}
]
},
{
"name": {
"value": "xmlrpc-c",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.33.14-9",
"evidence": "/affected/9/versions"
},
{
"value": "1.33.14-10",
"evidence": "/affected/9/versions"
},
{
"value": "1.33.14-10ubuntu0.1~esm1",
"evidence": "/affected/9/versions"
}
]
},
{
"name": {
"value": "xmlrpc-c",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.33.14-11",
"evidence": "/affected/10/versions"
},
{
"value": "1.33.14-11.1",
"evidence": "/affected/10/versions"
},
{
"value": "1.33.14-12",
"evidence": "/affected/10/versions"
},
{
"value": "1.33.14-12build1",
"evidence": "/affected/10/versions"
},
{
"value": "1.33.14-12build2",
"evidence": "/affected/10/versions"
},
{
"value": "1.33.14-12ubuntu0.1~esm1",
"evidence": "/affected/10/versions"
}
]
},
{
"name": {
"value": "sitecopy",
"evidence": "/affected/11/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:0.16.6-16",
"evidence": "/affected/11/versions"
},
{
"value": "1:0.16.6-16build1",
"evidence": "/affected/11/versions"
}
]
},
{
"name": {
"value": "xmlrpc-c",
"evidence": "/affected/12/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.59.03-7",
"evidence": "/affected/12/versions"
},
{
"value": "1.59.03-9",
"evidence": "/affected/12/versions"
},
{
"value": "1.59.03-10",
"evidence": "/affected/12/versions"
},
{
"value": "1.59.03-10.1",
"evidence": "/affected/12/versions"
}
]
},
{
"name": {
"value": "sitecopy",
"evidence": "/affected/13/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:0.16.6-16build1",
"evidence": "/affected/13/versions"
}
]
},
{
"name": {
"value": "xmlrpc-c",
"evidence": "/affected/14/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.60.05-1",
"evidence": "/affected/14/versions"
},
{
"value": "1.60.05-1build1",
"evidence": "/affected/14/versions"
}
]
},
{
"name": {
"value": "sitecopy",
"evidence": "/affected/15/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1:0.16.6-16build1",
"evidence": "/affected/15/versions"
}
]
},
{
"name": {
"value": "xmlrpc-c",
"evidence": "/affected/16/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.59.03-10.1",
"evidence": "/affected/16/versions"
},
{
"value": "1.60.05-1",
"evidence": "/affected/16/versions"
}
]
}
],
"severity": "high",
"structured": {
"id": "UBUNTU-CVE-2016-5300",
"aliases": [
"UBUNTU-CVE-2016-5300"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.0-4ubuntu1.3"
}
]
}
],
"package": {
"name": "expat",
"purl": "pkg:deb/ubuntu/expat?arch=source&distro=trusty",
"ecosystem": "Ubuntu:14.04:LTS"
},
"versions": [
"2.1.0-4",
"2.1.0-4ubuntu1",
"2.1.0-4ubuntu1.1",
"2.1.0-4ubuntu1.2"
],
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"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "expat",
"binary_version": "2.1.0-4ubuntu1.3"
},
{
"binary_name": "lib64expat1",
"binary_version": "2.1.0-4ubuntu1.3"
},
{
"binary_name": "libexpat1",
"binary_version": "2.1.0-4ubuntu1.3"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "vnc4",
"purl": "pkg:deb/ubuntu/vnc4?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
"4.1.1+xorg4.3.0-37ubuntu5",
"4.1.1+xorg4.3.0-37ubuntu5.0.1",
"4.1.1+xorg4.3.0-37ubuntu5.0.2",
"4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "vnc4server",
"binary_version": "4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1"
},
{
"binary_name": "xvnc4viewer",
"binary_version": "4.1.1+xorg4.3.0-37ubuntu5.0.2+esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
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}
]
}
],
"package": {
"name": "xmlrpc-c",
"purl": "pkg:deb/ubuntu/xmlrpc-c?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
"1.16.33-3.2ubuntu3",
"1.33.06-0ubuntu1",
"1.33.06-0ubuntu1+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libxmlrpc-c++8",
"binary_version": "1.33.06-0ubuntu1+esm1"
},
{
"binary_name": "libxmlrpc-core-c3",
"binary_version": "1.33.06-0ubuntu1+esm1"
},
{
"binary_name": "xmlrpc-api-utils",
"binary_version": "1.33.06-0ubuntu1+esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.1.0-7ubuntu0.16.04.2"
}
]
}
],
"package": {
"name": "expat",
"purl": "pkg:deb/ubuntu/expat?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"2.1.0-7",
"2.1.0-7ubuntu0.16.04.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "expat",
"binary_version": "2.1.0-7ubuntu0.16.04.2"
},
{
"binary_name": "lib64expat1",
"binary_version": "2.1.0-7ubuntu0.16.04.2"
},
{
"binary_name": "libexpat1",
"binary_version": "2.1.0-7ubuntu0.16.04.2"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "vnc4",
"purl": "pkg:deb/ubuntu/vnc4?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"4.1.1+xorg4.3.0-37.3ubuntu2",
"4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "vnc4server",
"binary_version": "4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1"
},
{
"binary_name": "xvnc4viewer",
"binary_version": "4.1.1+xorg4.3.0-37.3ubuntu2.1+esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "xmlrpc-c",
"purl": "pkg:deb/ubuntu/xmlrpc-c?arch=source&distro=esm-apps-legacy%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"1.33.14-0.2ubuntu3",
"1.33.14-1ubuntu1",
"1.33.14-1ubuntu1+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libxmlrpc-c++8v5",
"binary_version": "1.33.14-1ubuntu1+esm1"
},
{
"binary_name": "libxmlrpc-core-c3",
"binary_version": "1.33.14-1ubuntu1+esm1"
},
{
"binary_name": "xmlrpc-api-utils",
"binary_version": "1.33.14-1ubuntu1+esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "vnc4",
"purl": "pkg:deb/ubuntu/vnc4?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"4.1.1+xorg4.3.0-37.3ubuntu2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "vnc4server",
"binary_version": "4.1.1+xorg4.3.0-37.3ubuntu2"
},
{
"binary_name": "xvnc4viewer",
"binary_version": "4.1.1+xorg4.3.0-37.3ubuntu2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "xmlrpc-c",
"purl": "pkg:deb/ubuntu/xmlrpc-c?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"1.33.14-7",
"1.33.14-8",
"1.33.14-8build1",
"1.33.14-8ubuntu0.18.04.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libxmlrpc-c++8v5",
"binary_version": "1.33.14-8ubuntu0.18.04.1~esm1"
},
{
"binary_name": "libxmlrpc-core-c3",
"binary_version": "1.33.14-8ubuntu0.18.04.1~esm1"
},
{
"binary_name": "xmlrpc-api-utils",
"binary_version": "1.33.14-8ubuntu0.18.04.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "xmlrpc-c",
"purl": "pkg:deb/ubuntu/xmlrpc-c?arch=source&distro=esm-apps%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"1.33.14-8build1",
"1.33.14-8build2",
"1.33.14-8ubuntu0.20.04.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libxmlrpc-c++8v5",
"binary_version": "1.33.14-8ubuntu0.20.04.1~esm1"
},
{
"binary_name": "libxmlrpc-core-c3",
"binary_version": "1.33.14-8ubuntu0.20.04.1~esm1"
},
{
"binary_name": "xmlrpc-api-utils",
"binary_version": "1.33.14-8ubuntu0.20.04.1~esm1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "xmlrpc-c",
"purl": "pkg:deb/ubuntu/xmlrpc-c?arch=source&distro=esm-apps%2Fjammy",
"ecosystem": "Ubuntu:Pro:22.04:LTS"
},
"versions": [
"1.33.14-9",
"1.33.14-10",
"1.33.14-10ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2016/UBUNTU-CVE-2016-5300.json"
},
"ecosystem_specific": {
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],
"modified": "2026-10-17T12:52:45.959946554Z",
"provider": "osv",
"upstream": [
"CVE-2016-5300"
],
"references": [
"https://ubuntu.com/security/CVE-2016-5300",
"https://ubuntu.com/security/notices/USN-3013-1",
"https://ubuntu.com/security/notices/USN-3010-1",
"https://www.cve.org/CVERecord?id=CVE-2016-5300"
]
},
"related_cves": [
{
"value": "CVE-2016-5300",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 353287,
"published_at": "2016-06-06T00:00:00+00:00"
}