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vuln-ubuntu/data/osv/usn/USN-4991-1.json
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{
"schema_version": "1.7.0",
"id": "USN-4991-1",
"summary": "libxml2 vulnerabilities",
"details": "Yunho Kim discovered that libxml2 incorrectly handled certain error\nconditions. A remote attacker could exploit this with a crafted XML file to\ncause a denial of service, or possibly cause libxml2 to expose sensitive\ninformation. This issue only affected Ubuntu 14.04 ESM, and Ubuntu 16.04\nESM. (CVE-2017-8872)\n\nZhipeng Xie discovered that libxml2 incorrectly handled certain XML\nschemas. A remote attacker could possibly use this issue to cause a denial\nof service. This issue only affected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM,\nand Ubuntu 18.04 LTS. (CVE-2019-20388)\n\nIt was discovered that libxml2 incorrectly handled invalid UTF-8 input. A\nremote attacker could possibly exploit this with a crafted XML file to\ncause libxml2 to crash, resulting in a denial of service. This issue only\naffected Ubuntu 14.04 ESM, Ubuntu 16.04 ESM, Ubuntu 18.04 LTS, Ubuntu 20.04\nLTS and Ubuntu 20.10. (CVE-2020-24977)\n\nIt was discovered that libxml2 incorrectly handled invalid UTF-8 input. A\nremote attacker could possibly exploit this with a crafted XML file to\ncause libxml2 to crash, resulting in a denial of service. (CVE-2021-3517)\n\nIt was discovered that libxml2 did not properly handle certain crafted XML\nfiles. A local attacker could exploit this with a crafted input to cause\nlibxml2 to crash, resulting in a denial of service, or possibly execute\narbitrary code. (CVE-2021-3516, CVE-2021-3518)\n\nIt was discovered that libxml2 incorrectly handled error states. A remote\nattacker could exploit this with a crafted XML file to cause libxml2 to\ncrash, resulting in a denial of service. (CVE-2021-3537)\n\nSebastian Pipping discovered that libxml2 did not properly handle certain\ncrafted XML files. A remote attacker could exploit this with a crafted XML\nfile to cause libxml2 to crash, resulting in a denial of service. This\nissue only affected Ubuntu 20.04 LTS, Ubuntu 20.10, and Ubuntu 21.04.\n(CVE-2021-3541)\n",
"aliases": [],
"upstream": [
"UBUNTU-CVE-2017-8872",
"UBUNTU-CVE-2019-20388",
"UBUNTU-CVE-2020-24977",
"UBUNTU-CVE-2021-3516",
"UBUNTU-CVE-2021-3517",
"UBUNTU-CVE-2021-3518",
"UBUNTU-CVE-2021-3537",
"UBUNTU-CVE-2021-3541"
],
"related": [],
"published": "2021-06-17T14:59:21Z",
"modified": "2026-06-29T10:52:50Z",
"affected": [
{
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "libxml2",
"purl": "pkg:deb/ubuntu/libxml2@2.9.1+dfsg1-3ubuntu4.13+esm2?arch=source&distro=trusty/esm"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.9.1+dfsg1-3ubuntu4.13+esm2"
}
]
}
],
"versions": [
"2.9.1+dfsg1-3ubuntu2",
"2.9.1+dfsg1-3ubuntu3",
"2.9.1+dfsg1-3ubuntu4",
"2.9.1+dfsg1-3ubuntu4.1",
"2.9.1+dfsg1-3ubuntu4.2",
"2.9.1+dfsg1-3ubuntu4.3",
"2.9.1+dfsg1-3ubuntu4.4",
"2.9.1+dfsg1-3ubuntu4.5",
"2.9.1+dfsg1-3ubuntu4.6",
"2.9.1+dfsg1-3ubuntu4.7",
"2.9.1+dfsg1-3ubuntu4.8",
"2.9.1+dfsg1-3ubuntu4.9",
"2.9.1+dfsg1-3ubuntu4.10",
"2.9.1+dfsg1-3ubuntu4.11",
"2.9.1+dfsg1-3ubuntu4.12",
"2.9.1+dfsg1-3ubuntu4.13",
"2.9.1+dfsg1-3ubuntu4.13+esm1"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libxml2",
"binary_version": "2.9.1+dfsg1-3ubuntu4.13+esm2"
},
{
"binary_name": "libxml2-utils",
"binary_version": "2.9.1+dfsg1-3ubuntu4.13+esm2"
},
{
"binary_name": "python-libxml2",
"binary_version": "2.9.1+dfsg1-3ubuntu4.13+esm2"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
},
"database_specific": {
"cves_map": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"cves": [
{
"id": "CVE-2017-8872",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2019-20388",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2020-24977",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2021-3516",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3517",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3518",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3537",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
]
}
}
},
{
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "libxml2",
"purl": "pkg:deb/ubuntu/libxml2@2.9.3+dfsg1-1ubuntu0.7+esm1?arch=source&distro=esm-infra/xenial"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.9.3+dfsg1-1ubuntu0.7+esm1"
}
]
}
],
"versions": [
"2.9.2+zdfsg1-4",
"2.9.2+zdfsg1-4ubuntu1",
"2.9.2+zdfsg1-4ubuntu2",
"2.9.2+zdfsg1-4ubuntu3",
"2.9.3+dfsg1-1",
"2.9.3+dfsg1-1ubuntu0.1",
"2.9.3+dfsg1-1ubuntu0.2",
"2.9.3+dfsg1-1ubuntu0.3",
"2.9.3+dfsg1-1ubuntu0.4",
"2.9.3+dfsg1-1ubuntu0.5",
"2.9.3+dfsg1-1ubuntu0.6",
"2.9.3+dfsg1-1ubuntu0.7"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libxml2",
"binary_version": "2.9.3+dfsg1-1ubuntu0.7+esm1"
},
{
"binary_name": "libxml2-utils",
"binary_version": "2.9.3+dfsg1-1ubuntu0.7+esm1"
},
{
"binary_name": "python-libxml2",
"binary_version": "2.9.3+dfsg1-1ubuntu0.7+esm1"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
},
"database_specific": {
"cves_map": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"cves": [
{
"id": "CVE-2017-8872",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2019-20388",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2020-24977",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2021-3516",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3517",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3518",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3537",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
]
}
}
},
{
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "libxml2",
"purl": "pkg:deb/ubuntu/libxml2@2.9.4+dfsg1-6.1ubuntu1.4?arch=source&distro=bionic"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.9.4+dfsg1-6.1ubuntu1.4"
}
]
}
],
"versions": [
"2.9.4+dfsg1-4ubuntu1",
"2.9.4+dfsg1-5ubuntu1",
"2.9.4+dfsg1-5ubuntu2",
"2.9.4+dfsg1-5.1ubuntu1",
"2.9.4+dfsg1-5.2ubuntu1",
"2.9.4+dfsg1-6.1ubuntu1",
"2.9.4+dfsg1-6.1ubuntu1.2",
"2.9.4+dfsg1-6.1ubuntu1.3"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libxml2",
"binary_version": "2.9.4+dfsg1-6.1ubuntu1.4"
},
{
"binary_name": "libxml2-utils",
"binary_version": "2.9.4+dfsg1-6.1ubuntu1.4"
},
{
"binary_name": "python-libxml2",
"binary_version": "2.9.4+dfsg1-6.1ubuntu1.4"
},
{
"binary_name": "python3-libxml2",
"binary_version": "2.9.4+dfsg1-6.1ubuntu1.4"
}
],
"availability": "No subscription required"
},
"database_specific": {
"cves_map": {
"ecosystem": "Ubuntu:18.04:LTS",
"cves": [
{
"id": "CVE-2019-20388",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2020-24977",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2021-3516",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3517",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3518",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3537",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
]
}
}
},
{
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "libxml2",
"purl": "pkg:deb/ubuntu/libxml2@2.9.10+dfsg-5ubuntu0.20.04.1?arch=source&distro=focal"
},
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.9.10+dfsg-5ubuntu0.20.04.1"
}
]
}
],
"versions": [
"2.9.4+dfsg1-7ubuntu3",
"2.9.4+dfsg1-7ubuntu5",
"2.9.4+dfsg1-8ubuntu1",
"2.9.4+dfsg1-8ubuntu2",
"2.9.4+dfsg1-8ubuntu3",
"2.9.10+dfsg-1ubuntu3",
"2.9.10+dfsg-4build1",
"2.9.10+dfsg-5"
],
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libxml2",
"binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1"
},
{
"binary_name": "libxml2-utils",
"binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1"
},
{
"binary_name": "python-libxml2",
"binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1"
},
{
"binary_name": "python3-libxml2",
"binary_version": "2.9.10+dfsg-5ubuntu0.20.04.1"
}
],
"availability": "No subscription required"
},
"database_specific": {
"cves_map": {
"ecosystem": "Ubuntu:20.04:LTS",
"cves": [
{
"id": "CVE-2020-24977",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L"
},
{
"type": "Ubuntu",
"score": "low"
}
]
},
{
"id": "CVE-2021-3516",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3517",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3518",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3537",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
},
{
"id": "CVE-2021-3541",
"severity": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"
},
{
"type": "Ubuntu",
"score": "medium"
}
]
}
]
}
}
}
],
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4991-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2017-8872"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-20388"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-24977"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3516"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3517"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3518"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3537"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-3541"
}
]
}
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