ubuntu-cve-2021-37311
Vulnerability from osv_ubuntu
Published
2023-02-03 18:15
Modified
2026-05-20 14:53
Summary
Details
Buffer Overflow vulnerability in fcitx5 5.0.8 allows attackers to cause a denial of service via crafted message to the application's listening port.
Severity
7.5 (High)
7.5 (High)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fcitx5",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "fcitx5-data",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "fcitx5-module-dbus",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "fcitx5-module-ibus",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "fcitx5-module-kimpanel",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "fcitx5-module-quickphrase",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "fcitx5-module-wayland",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "fcitx5-module-xorg",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "fcitx5-modules",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "libfcitx5config5",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "libfcitx5core5",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
},
{
"binary_name": "libfcitx5utils1",
"binary_version": "0.0~git20200128.9e3bc8d+ds1-3"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "fcitx5",
"purl": "pkg:deb/ubuntu/fcitx5@0.0~git20200128.9e3bc8d+ds1-3?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0~20181128+ds1-1build1",
"0~20191021+ds1-1",
"0~20191021+ds2-1",
"0~20191021+ds2-2",
"0.0~git20191114.c2b3517+ds1-1",
"0.0~git20191231.c0a272a+ds1-1",
"0.0~git20191231.c0a272a+ds1-2",
"0.0~git20200117.a2871df+ds2-1",
"0.0~git20200128.9e3bc8d+ds1-1",
"0.0~git20200128.9e3bc8d+ds1-2",
"0.0~git20200128.9e3bc8d+ds1-3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fcitx5",
"binary_version": "5.0.14-1"
},
{
"binary_name": "fcitx5-data",
"binary_version": "5.0.14-1"
},
{
"binary_name": "fcitx5-module-emoji",
"binary_version": "5.0.14-1"
},
{
"binary_name": "fcitx5-module-quickphrase",
"binary_version": "5.0.14-1"
},
{
"binary_name": "fcitx5-module-wayland",
"binary_version": "5.0.14-1"
},
{
"binary_name": "fcitx5-module-xorg",
"binary_version": "5.0.14-1"
},
{
"binary_name": "fcitx5-modules",
"binary_version": "5.0.14-1"
},
{
"binary_name": "libfcitx5config6",
"binary_version": "5.0.14-1"
},
{
"binary_name": "libfcitx5core7",
"binary_version": "5.0.14-1"
},
{
"binary_name": "libfcitx5utils2",
"binary_version": "5.0.14-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "fcitx5",
"purl": "pkg:deb/ubuntu/fcitx5@5.0.14-1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.0.5-1ubuntu2",
"5.0.9-2",
"5.0.10-1",
"5.0.11-1",
"5.0.12-1",
"5.0.13-1",
"5.0.14-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fcitx5",
"binary_version": "5.1.7-1build3"
},
{
"binary_name": "fcitx5-data",
"binary_version": "5.1.7-1build3"
},
{
"binary_name": "fcitx5-frontend-all",
"binary_version": "5.1.7-1build3"
},
{
"binary_name": "fcitx5-modules",
"binary_version": "5.1.7-1build3"
},
{
"binary_name": "libfcitx5config6",
"binary_version": "5.1.7-1build3"
},
{
"binary_name": "libfcitx5core7",
"binary_version": "5.1.7-1build3"
},
{
"binary_name": "libfcitx5utils2",
"binary_version": "5.1.7-1build3"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "fcitx5",
"purl": "pkg:deb/ubuntu/fcitx5@5.1.7-1build3?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.1.0-1",
"5.1.1-1",
"5.1.2-1",
"5.1.3-1",
"5.1.4-1",
"5.1.5-1",
"5.1.6-1",
"5.1.6-2",
"5.1.7-1",
"5.1.7-1build2",
"5.1.7-1build3"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fcitx5",
"binary_version": "5.1.14-1"
},
{
"binary_name": "fcitx5-data",
"binary_version": "5.1.14-1"
},
{
"binary_name": "fcitx5-frontend-all",
"binary_version": "5.1.14-1"
},
{
"binary_name": "fcitx5-modules",
"binary_version": "5.1.14-1"
},
{
"binary_name": "libfcitx5config6",
"binary_version": "5.1.14-1"
},
{
"binary_name": "libfcitx5core7",
"binary_version": "5.1.14-1"
},
{
"binary_name": "libfcitx5utils2",
"binary_version": "5.1.14-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "fcitx5",
"purl": "pkg:deb/ubuntu/fcitx5@5.1.14-1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.1.12-2",
"5.1.14-1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "fcitx5",
"binary_version": "5.1.19-1"
},
{
"binary_name": "fcitx5-data",
"binary_version": "5.1.19-1"
},
{
"binary_name": "fcitx5-frontend-all",
"binary_version": "5.1.19-1"
},
{
"binary_name": "fcitx5-modules",
"binary_version": "5.1.19-1"
},
{
"binary_name": "libfcitx5config6",
"binary_version": "5.1.19-1"
},
{
"binary_name": "libfcitx5core7",
"binary_version": "5.1.19-1"
},
{
"binary_name": "libfcitx5utils2",
"binary_version": "5.1.19-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "fcitx5",
"purl": "pkg:deb/ubuntu/fcitx5@5.1.19-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"5.1.14-1",
"5.1.16-1",
"5.1.17-1",
"5.1.19-1"
]
}
],
"aliases": [],
"details": "Buffer Overflow vulnerability in fcitx5 5.0.8 allows attackers to cause a denial of service via crafted message to the application\u0027s listening port.",
"id": "UBUNTU-CVE-2021-37311",
"modified": "2026-05-20T14:53:27Z",
"published": "2023-02-03T18:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-37311"
},
{
"type": "REPORT",
"url": "https://fcitx-im.org"
},
{
"type": "REPORT",
"url": "https://github.com/fcitx/fcitx5/pull/308"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-37311"
}
],
"related": [],
"schema_version": "1.7.0",
"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": "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"
}
],
"upstream": [
"CVE-2021-37311"
]
}
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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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