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yaws — security advisory
Yaws 1.85 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.
- Products
- yaws
- Affected versions
- 1.98-5, 1.99-1, 1.99-2, 2.0.2-1, 2.0.4+dfsg-2, 2.0.4+dfsg-2ubuntu0.1, 2.0.6+dfsg-1, 2.0.6+dfsg-3, 2.0.7+dfsg-1, 2.0.8+dfsg-3, 2.0.9+dfsg-1, 2.1.0+dfsg-1, 2.1.1+dfsg-1, 2.1.1+dfsg-2, 2.2.0+dfsg-2, 2.2.0+dfsg-2build1, 2.3.1+dfsg-2
- Fixed versions
- Not specified
- CVEs
- CVE-2009-4495
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 00:20 UTC · Revision 1
Source evidence
Yaws 1.85 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.
osv:UBUNTU-CVE-2009-4495
yaws
Fixed versions: Not specified
yaws
Fixed versions: Not specified
yaws
Fixed versions: Not specified
yaws
Fixed versions: Not specified
yaws
Fixed versions: Not specified
yaws
Fixed versions: Not specified
yaws
Fixed versions: Not specified
yaws
Fixed versions: Not specified
Complete source record
{
"id": "ded733be1a9db7f3c8328403db0ddb036acc558f64e62a13ddad0cb7d267addc",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2009-4495",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2009-4495",
"summary": "Yaws 1.85 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.",
"evidence": "osv:UBUNTU-CVE-2009-4495",
"products": [
{
"name": {
"value": "yaws",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.98-5",
"evidence": "/affected/0/versions"
},
{
"value": "1.99-1",
"evidence": "/affected/0/versions"
},
{
"value": "1.99-2",
"evidence": "/affected/0/versions"
},
{
"value": "2.0.2-1",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "yaws",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.4+dfsg-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.0.4+dfsg-2ubuntu0.1",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "yaws",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.6+dfsg-1",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.6+dfsg-3",
"evidence": "/affected/2/versions"
},
{
"value": "2.0.7+dfsg-1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "yaws",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.0.8+dfsg-3",
"evidence": "/affected/3/versions"
},
{
"value": "2.0.9+dfsg-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.1.0+dfsg-1",
"evidence": "/affected/3/versions"
},
{
"value": "2.1.1+dfsg-1",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "yaws",
"evidence": "/affected/4/package/name"
},
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"fixed_versions": [],
"affected_versions": [
{
"value": "2.1.1+dfsg-2",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "yaws",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.0+dfsg-2",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "yaws",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.0+dfsg-2build1",
"evidence": "/affected/6/versions"
},
{
"value": "2.3.1+dfsg-2",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "yaws",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "2.2.0+dfsg-2",
"evidence": "/affected/7/versions"
},
{
"value": "2.2.0+dfsg-2build1",
"evidence": "/affected/7/versions"
}
]
}
],
"severity": "unknown",
"structured": {
"id": "UBUNTU-CVE-2009-4495",
"aliases": [
"UBUNTU-CVE-2009-4495"
],
"metrics": [
{
"type": "Ubuntu",
"score": "negligible"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.98-5",
"1.99-1",
"1.99-2",
"2.0.2-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2009/UBUNTU-CVE-2009-4495.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.0.2-1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.0.2-1"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.0.2-1"
}
]
}
},
{
"ranges": [
{
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"events": [
{
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}
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}
],
"package": {
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"2.0.4+dfsg-2",
"2.0.4+dfsg-2ubuntu0.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2009/UBUNTU-CVE-2009-4495.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.0.4+dfsg-2ubuntu0.1"
}
]
}
},
{
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],
"package": {
"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"2.0.6+dfsg-1",
"2.0.6+dfsg-3",
"2.0.7+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2009/UBUNTU-CVE-2009-4495.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.0.7+dfsg-1"
},
{
"binary_name": "yaws-yapp",
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}
]
}
},
{
"ranges": [
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"events": [
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}
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}
],
"package": {
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"purl": "pkg:deb/ubuntu/yaws?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"2.0.8+dfsg-3",
"2.0.9+dfsg-1",
"2.1.0+dfsg-1",
"2.1.1+dfsg-1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2009/UBUNTU-CVE-2009-4495.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "yaws",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.1.1+dfsg-1"
},
{
"binary_name": "yaws-wiki",
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{
"binary_name": "yaws-yapp",
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}
]
}
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"purl": "pkg:deb/ubuntu/yaws?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"2.1.1+dfsg-2"
],
"database_specific": {
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},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "yaws",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.1.1+dfsg-2"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.1.1+dfsg-2"
},
{
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]
}
},
{
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],
"package": {
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"purl": "pkg:deb/ubuntu/yaws?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"2.2.0+dfsg-2"
],
"database_specific": {
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},
"ecosystem_specific": {
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{
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"binary_version": "2.2.0+dfsg-2"
},
{
"binary_name": "erlang-yaws",
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},
{
"binary_name": "yaws",
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},
{
"binary_name": "yaws-chat",
"binary_version": "2.2.0+dfsg-2"
},
{
"binary_name": "yaws-mail",
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},
{
"binary_name": "yaws-wiki",
"binary_version": "2.2.0+dfsg-2"
},
{
"binary_name": "yaws-yapp",
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}
]
}
},
{
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{
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{
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],
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"purl": "pkg:deb/ubuntu/yaws?arch=source&distro=stonking",
"ecosystem": "Ubuntu:26.10"
},
"versions": [
"2.2.0+dfsg-2build1",
"2.3.1+dfsg-2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2009/UBUNTU-CVE-2009-4495.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.3.1+dfsg-2"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.3.1+dfsg-2"
},
{
"binary_name": "yaws",
"binary_version": "2.3.1+dfsg-2"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.3.1+dfsg-2"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.3.1+dfsg-2"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.3.1+dfsg-2"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.3.1+dfsg-2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
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{
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}
]
}
],
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"name": "yaws",
"purl": "pkg:deb/ubuntu/yaws?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
"2.2.0+dfsg-2",
"2.2.0+dfsg-2build1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2009/UBUNTU-CVE-2009-4495.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "erlang-yapp",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "erlang-yaws",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws-chat",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws-mail",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws-wiki",
"binary_version": "2.2.0+dfsg-2build1"
},
{
"binary_name": "yaws-yapp",
"binary_version": "2.2.0+dfsg-2build1"
}
]
}
}
],
"modified": "2026-10-17T12:52:46.930148785Z",
"provider": "osv",
"upstream": [
"CVE-2009-4495"
],
"references": [
"https://ubuntu.com/security/CVE-2009-4495",
"https://www.cve.org/CVERecord?id=CVE-2009-4495"
]
},
"related_cves": [
{
"value": "CVE-2009-4495",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 353289,
"published_at": "2010-01-13T20:30:00+00:00"
}