usn-5235-1
Vulnerability from osv_ubuntu
Published
2022-01-18 17:13
Modified
2026-06-25 10:46
Summary
ruby2.3, ruby2.5, ruby2.7 vulnerabilities
Details
It was discovered that Ruby incorrectly handled certain HTML files. An attacker could possibly use this issue to cause a crash. This issue only affected Ubuntu 20.04 LTS, Ubuntu 21.04, and Ubuntu 21.10. (CVE-2021-41816)
It was discovered that Ruby incorrectly handled certain regular expressions. An attacker could possibly use this issue to cause a regular expression denial of service. (CVE-2021-41817)
It was discovered that Ruby incorrectly handled certain cookie names. An attacker could possibly use this issue to access or expose sensitive information. (CVE-2021-41819)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-41817",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-41819",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "libruby2.3",
"binary_version": "2.3.1-2~ubuntu16.04.16+esm2"
},
{
"binary_name": "ruby2.3",
"binary_version": "2.3.1-2~ubuntu16.04.16+esm2"
},
{
"binary_name": "ruby2.3-tcltk",
"binary_version": "2.3.1-2~ubuntu16.04.16+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "ruby2.3",
"purl": "pkg:deb/ubuntu/ruby2.3@2.3.1-2~ubuntu16.04.16+esm2?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.3.1-2~ubuntu16.04.16+esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.3.0-1",
"2.3.0-2",
"2.3.0-4ubuntu2",
"2.3.0-4ubuntu3",
"2.3.0-5ubuntu1",
"2.3.1-2~16.04",
"2.3.1-2~16.04.2",
"2.3.1-2~16.04.4",
"2.3.1-2~16.04.5",
"2.3.1-2~16.04.6",
"2.3.1-2~16.04.7",
"2.3.1-2~16.04.9",
"2.3.1-2~16.04.10",
"2.3.1-2~16.04.11",
"2.3.1-2~16.04.12",
"2.3.1-2~ubuntu16.04.13",
"2.3.1-2~ubuntu16.04.14",
"2.3.1-2~ubuntu16.04.15",
"2.3.1-2~ubuntu16.04.16",
"2.3.1-2~ubuntu16.04.16+esm1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-41817",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-41819",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libruby2.5",
"binary_version": "2.5.1-1ubuntu1.11"
},
{
"binary_name": "ruby2.5",
"binary_version": "2.5.1-1ubuntu1.11"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "ruby2.5",
"purl": "pkg:deb/ubuntu/ruby2.5@2.5.1-1ubuntu1.11?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.5.1-1ubuntu1.11"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.5.0~preview1-1ubuntu2",
"2.5.0-4ubuntu1",
"2.5.0-4ubuntu4",
"2.5.0-5ubuntu1",
"2.5.0-6ubuntu1",
"2.5.1-1ubuntu1",
"2.5.1-1ubuntu1.1",
"2.5.1-1ubuntu1.2",
"2.5.1-1ubuntu1.4",
"2.5.1-1ubuntu1.5",
"2.5.1-1ubuntu1.6",
"2.5.1-1ubuntu1.7",
"2.5.1-1ubuntu1.8",
"2.5.1-1ubuntu1.9",
"2.5.1-1ubuntu1.10"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2021-41816",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-41817",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2021-41819",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "libruby2.7",
"binary_version": "2.7.0-5ubuntu1.6"
},
{
"binary_name": "ruby2.7",
"binary_version": "2.7.0-5ubuntu1.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "ruby2.7",
"purl": "pkg:deb/ubuntu/ruby2.7@2.7.0-5ubuntu1.6?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.0-5ubuntu1.6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.7.0-1",
"2.7.0-2",
"2.7.0-3",
"2.7.0-4",
"2.7.0-4ubuntu1",
"2.7.0-5ubuntu1",
"2.7.0-5ubuntu1.1",
"2.7.0-5ubuntu1.2",
"2.7.0-5ubuntu1.3",
"2.7.0-5ubuntu1.4",
"2.7.0-5ubuntu1.5"
]
}
],
"aliases": [],
"details": "It was discovered that Ruby incorrectly handled certain HTML files.\nAn attacker could possibly use this issue to cause a crash. This\nissue only affected Ubuntu 20.04 LTS, Ubuntu 21.04, and Ubuntu 21.10.\n(CVE-2021-41816)\n\nIt was discovered that Ruby incorrectly handled certain regular expressions.\nAn attacker could possibly use this issue to cause a regular expression\ndenial of service. (CVE-2021-41817)\n\nIt was discovered that Ruby incorrectly handled certain cookie names.\nAn attacker could possibly use this issue to access or expose\nsensitive information. (CVE-2021-41819)\n",
"id": "USN-5235-1",
"modified": "2026-06-25T10:46:03Z",
"published": "2022-01-18T17:13:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5235-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-41816"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-41817"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-41819"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "ruby2.3, ruby2.5, ruby2.7 vulnerabilities",
"upstream": [
"UBUNTU-CVE-2021-41816",
"UBUNTU-CVE-2021-41817",
"UBUNTU-CVE-2021-41819"
]
}
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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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