ubuntu-cve-2021-40516
Vulnerability from osv_ubuntu
Published
2021-09-05 18:15
Modified
2026-04-22 07:40
Summary
Details
WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bounds read in plugins/relay/relay-websocket.c in the Relay plugin.
Severity
7.5 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "weechat",
"binary_version": "1.4-2ubuntu0.1+esm1"
},
{
"binary_name": "weechat-core",
"binary_version": "1.4-2ubuntu0.1+esm1"
},
{
"binary_name": "weechat-curses",
"binary_version": "1.4-2ubuntu0.1+esm1"
},
{
"binary_name": "weechat-plugins",
"binary_version": "1.4-2ubuntu0.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "weechat",
"purl": "pkg:deb/ubuntu/weechat@1.4-2ubuntu0.1+esm1?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.4-2ubuntu0.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.3-1",
"1.3-1build1",
"1.4-1",
"1.4-1build1",
"1.4-1build2",
"1.4-2",
"1.4-2ubuntu0.1"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "weechat",
"binary_version": "1.9.1-1ubuntu1+esm1"
},
{
"binary_name": "weechat-core",
"binary_version": "1.9.1-1ubuntu1+esm1"
},
{
"binary_name": "weechat-curses",
"binary_version": "1.9.1-1ubuntu1+esm1"
},
{
"binary_name": "weechat-plugins",
"binary_version": "1.9.1-1ubuntu1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "weechat",
"purl": "pkg:deb/ubuntu/weechat@1.9.1-1ubuntu1+esm1?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.9.1-1ubuntu1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9.1-1",
"1.9.1-1build1",
"1.9.1-1ubuntu1"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "weechat",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-core",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-curses",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-guile",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-headless",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-lua",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-perl",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-php",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-plugins",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-python",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-ruby",
"binary_version": "2.8-1ubuntu0.1~esm1"
},
{
"binary_name": "weechat-tcl",
"binary_version": "2.8-1ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "weechat",
"purl": "pkg:deb/ubuntu/weechat@2.8-1ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.8-1ubuntu0.1~esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.6-2",
"2.6-2build1",
"2.6-2build2",
"2.6-2ubuntu1",
"2.6-2ubuntu2",
"2.8-1"
]
}
],
"aliases": [],
"details": "WeeChat before 3.2.1 allows remote attackers to cause a denial of service (crash) via a crafted WebSocket frame that trigger an out-of-bounds read in plugins/relay/relay-websocket.c in the Relay plugin.",
"id": "UBUNTU-CVE-2021-40516",
"modified": "2026-04-22T07:40:09Z",
"published": "2021-09-05T18:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2021-40516"
},
{
"type": "REPORT",
"url": "https://github.com/weechat/weechat/commit/8b1331f98de1714bae15a9ca2e2b393ba49d735b"
},
{
"type": "REPORT",
"url": "https://weechat.org/doc/security/"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5258-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2021-40516"
}
],
"related": [
"USN-5258-1"
],
"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": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2021-40516"
]
}
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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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