usn-5133-1
Vulnerability from osv_ubuntu
Published
2021-11-04 20:12
Modified
2026-06-29 10:52
Summary
A security issue was fixed in ICU
Details
It was discovered that ICU contains a use after free issue. An attacker could use this issue to cause a denial of service with crafted input.
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2020-21913",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:14.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "icu-devtools",
"binary_version": "52.1-3ubuntu0.8+esm2"
},
{
"binary_name": "libicu52",
"binary_version": "52.1-3ubuntu0.8+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "icu",
"purl": "pkg:deb/ubuntu/icu@52.1-3ubuntu0.8+esm2?arch=source\u0026distro=trusty/esm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "52.1-3ubuntu0.8+esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"4.8.1.1-12ubuntu2",
"4.8.1.1-13+nmu1",
"4.8.1.1-13+nmu1ubuntu1",
"52.1-3",
"52.1-3ubuntu0.2",
"52.1-3ubuntu0.3",
"52.1-3ubuntu0.4",
"52.1-3ubuntu0.5",
"52.1-3ubuntu0.6",
"52.1-3ubuntu0.7",
"52.1-3ubuntu0.8",
"52.1-3ubuntu0.8+esm1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2020-21913",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "icu-devtools",
"binary_version": "55.1-7ubuntu0.5+esm1"
},
{
"binary_name": "libicu55",
"binary_version": "55.1-7ubuntu0.5+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "icu",
"purl": "pkg:deb/ubuntu/icu@55.1-7ubuntu0.5+esm1?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "55.1-7ubuntu0.5+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"55.1-4ubuntu1",
"55.1-6ubuntu1",
"55.1-7",
"55.1-7ubuntu0.1",
"55.1-7ubuntu0.2",
"55.1-7ubuntu0.3",
"55.1-7ubuntu0.4",
"55.1-7ubuntu0.5"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2020-21913",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "icu-devtools",
"binary_version": "60.2-3ubuntu3.2"
},
{
"binary_name": "libicu60",
"binary_version": "60.2-3ubuntu3.2"
},
{
"binary_name": "libiculx60",
"binary_version": "60.2-3ubuntu3.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "icu",
"purl": "pkg:deb/ubuntu/icu@60.2-3ubuntu3.2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "60.2-3ubuntu3.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"57.1-6",
"59.1-3ubuntu1",
"60.1-1ubuntu2",
"60.2-1ubuntu1",
"60.2-3ubuntu1",
"60.2-3ubuntu3",
"60.2-3ubuntu3.1"
]
}
],
"aliases": [],
"details": "It was discovered that ICU contains a use after free issue.\nAn attacker could use this issue to cause a denial of service with crafted input.\n\n",
"id": "USN-5133-1",
"modified": "2026-06-29T10:52:52Z",
"published": "2021-11-04T20:12:07Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5133-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-21913"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "A security issue was fixed in ICU",
"upstream": [
"UBUNTU-CVE-2020-21913"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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