MediumFix available
jruby, ruby-webrick and 3 more products — security advisory
Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable when the product is deployed behind an HTTP proxy that fulfills specific conditions. The specific flaw exists within the read_headers method. The issue results from the inconsistent parsing of terminators of HTTP headers. An attacker can leverage this vulnerability to smuggle arbitrary HTTP requests. Was ZDI-CAN-21876.
- Products
- jruby, ruby-webrick, ruby2.3, ruby2.5, ruby2.7
- Affected versions
- 1.5.6-5ubuntu1, 1.5.6-6, 1.5.6-7, 1.5.6-9+deb8u2build0.14.04.1~esm2, 1.7.0-1, 1.7.0-2, 1.7.0-3, 1.7.0-3ubuntu0.1, 1.7.21-2ubuntu4, 1.7.22-1ubuntu1, 1.8.1-1, 1.8.1-1ubuntu0.1, 1.8.1-1ubuntu1, 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, 2.3.1-2~16.04.10, 2.3.1-2~16.04.11, 2.3.1-2~16.04.12, 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~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, 2.3.1-2~ubuntu16.04.16+esm10, 2.3.1-2~ubuntu16.04.16+esm2, 2.3.1-2~ubuntu16.04.16+esm3, 2.3.1-2~ubuntu16.04.16+esm4, 2.3.1-2~ubuntu16.04.16+esm5, 2.3.1-2~ubuntu16.04.16+esm6, 2.3.1-2~ubuntu16.04.16+esm7, 2.3.1-2~ubuntu16.04.16+esm8, 2.3.1-2~ubuntu16.04.16+esm9, 2.5.0-4ubuntu1, 2.5.0-4ubuntu4, 2.5.0-5ubuntu1, 2.5.0-6ubuntu1, 2.5.0~preview1-1ubuntu2, 2.5.1-1ubuntu1, 2.5.1-1ubuntu1.1, 2.5.1-1ubuntu1.10, 2.5.1-1ubuntu1.11, 2.5.1-1ubuntu1.12, 2.5.1-1ubuntu1.13, 2.5.1-1ubuntu1.14, 2.5.1-1ubuntu1.15, 2.5.1-1ubuntu1.16, 2.5.1-1ubuntu1.16+esm1, 2.5.1-1ubuntu1.16+esm3, 2.5.1-1ubuntu1.16+esm4, 2.5.1-1ubuntu1.16+esm5, 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, 2.7.0-1, 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, 2.7.0-5ubuntu1.10, 2.7.0-5ubuntu1.11, 2.7.0-5ubuntu1.12, 2.7.0-5ubuntu1.13, 2.7.0-5ubuntu1.14, 2.7.0-5ubuntu1.15, 2.7.0-5ubuntu1.16, 2.7.0-5ubuntu1.17, 2.7.0-5ubuntu1.18, 2.7.0-5ubuntu1.18+esm1, 2.7.0-5ubuntu1.2, 2.7.0-5ubuntu1.3, 2.7.0-5ubuntu1.4, 2.7.0-5ubuntu1.5, 2.7.0-5ubuntu1.6, 2.7.0-5ubuntu1.7, 2.7.0-5ubuntu1.8, 2.7.0-5ubuntu1.9, 9.1.13.0-1, 9.1.17.0-1~18.04, 9.1.17.0-3, 9.1.17.0-3build5, 9.1.17.0-3build6
- Fixed versions
- 1.7.0-3ubuntu0.2, 1.8.1-1ubuntu0.2, 1.9.1-1, 2.3.1-2~ubuntu16.04.16+esm11, 2.5.1-1ubuntu1.16+esm6, 2.7.0-5ubuntu1.18+esm3
- CVEs
- CVE-2025-6442
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 28 Oct 2026, 09:08 UTC · Revision 1
Source evidence
Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable when the product is deployed behind an HTTP proxy that fulfills specific conditions. The specific flaw exists within the read_headers method. The issue results from the inconsistent parsing of terminators of HTTP headers. An attacker can leverage this vulnerability to smuggle arbitrary HTTP requests. Was ZDI-CAN-21876.
osv:UBUNTU-CVE-2025-6442
jruby
Fixed versions: Not specified
ruby2.3
Fixed versions: 2.3.1-2~ubuntu16.04.16+esm11
jruby
Fixed versions: Not specified
ruby2.5
Fixed versions: 2.5.1-1ubuntu1.16+esm6
jruby
Fixed versions: Not specified
ruby2.7
Fixed versions: 2.7.0-5ubuntu1.18+esm3
jruby
Fixed versions: Not specified
ruby-webrick
Fixed versions: 1.7.0-3ubuntu0.2
ruby-webrick
Fixed versions: 1.8.1-1ubuntu0.2
ruby-webrick
Fixed versions: 1.9.1-1
ruby-webrick
Fixed versions: 1.9.1-1
Complete source record
{
"id": "cf1716494bb8c4d3bf5237073024ecbfcc6b299d8be7f5740bc3290a2e06890e",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2025-6442",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2025-6442",
"summary": "Ruby WEBrick read_header HTTP Request Smuggling Vulnerability. This vulnerability allows remote attackers to smuggle arbitrary HTTP requests on affected installations of Ruby WEBrick. This issue is exploitable when the product is deployed behind an HTTP proxy that fulfills specific conditions. The specific flaw exists within the read_headers method. The issue results from the inconsistent parsing of terminators of HTTP headers. An attacker can leverage this vulnerability to smuggle arbitrary HTTP requests. Was ZDI-CAN-21876.",
"evidence": "osv:UBUNTU-CVE-2025-6442",
"products": [
{
"name": {
"value": "jruby",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.5.6-5ubuntu1",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.6-6",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.6-7",
"evidence": "/affected/0/versions"
},
{
"value": "1.5.6-9+deb8u2build0.14.04.1~esm2",
"evidence": "/affected/0/versions"
}
]
},
{
"name": {
"value": "ruby2.3",
"evidence": "/affected/1/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.3.1-2~ubuntu16.04.16+esm11",
"evidence": "/affected/1/ranges"
}
],
"affected_versions": [
{
"value": "2.3.0-1",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.0-2",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.0-4ubuntu2",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.0-4ubuntu3",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.0-5ubuntu1",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04.2",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04.4",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04.5",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04.6",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04.7",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04.9",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04.10",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04.11",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~16.04.12",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.13",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.14",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.15",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm1",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm2",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm3",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm4",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm5",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm6",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm7",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm8",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm9",
"evidence": "/affected/1/versions"
},
{
"value": "2.3.1-2~ubuntu16.04.16+esm10",
"evidence": "/affected/1/versions"
}
]
},
{
"name": {
"value": "jruby",
"evidence": "/affected/2/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "1.7.21-2ubuntu4",
"evidence": "/affected/2/versions"
},
{
"value": "1.7.22-1ubuntu1",
"evidence": "/affected/2/versions"
}
]
},
{
"name": {
"value": "ruby2.5",
"evidence": "/affected/3/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.5.1-1ubuntu1.16+esm6",
"evidence": "/affected/3/ranges"
}
],
"affected_versions": [
{
"value": "2.5.0~preview1-1ubuntu2",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.0-4ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.0-4ubuntu4",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.0-5ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.0-6ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.1",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.2",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.4",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.5",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.6",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.7",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.8",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.9",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.10",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.11",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.12",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.13",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.14",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.15",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.16",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.16+esm1",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.16+esm3",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.16+esm4",
"evidence": "/affected/3/versions"
},
{
"value": "2.5.1-1ubuntu1.16+esm5",
"evidence": "/affected/3/versions"
}
]
},
{
"name": {
"value": "jruby",
"evidence": "/affected/4/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "9.1.13.0-1",
"evidence": "/affected/4/versions"
},
{
"value": "9.1.17.0-1~18.04",
"evidence": "/affected/4/versions"
}
]
},
{
"name": {
"value": "ruby2.7",
"evidence": "/affected/5/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "2.7.0-5ubuntu1.18+esm3",
"evidence": "/affected/5/ranges"
}
],
"affected_versions": [
{
"value": "2.7.0-1",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-2",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-3",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-4",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-4ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.1",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.2",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.3",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.4",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.5",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.6",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.7",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.8",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.9",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.10",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.11",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.12",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.13",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.14",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.15",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.16",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.17",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.18",
"evidence": "/affected/5/versions"
},
{
"value": "2.7.0-5ubuntu1.18+esm1",
"evidence": "/affected/5/versions"
}
]
},
{
"name": {
"value": "jruby",
"evidence": "/affected/6/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": [
{
"value": "9.1.17.0-3",
"evidence": "/affected/6/versions"
},
{
"value": "9.1.17.0-3build5",
"evidence": "/affected/6/versions"
},
{
"value": "9.1.17.0-3build6",
"evidence": "/affected/6/versions"
}
]
},
{
"name": {
"value": "ruby-webrick",
"evidence": "/affected/7/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.7.0-3ubuntu0.2",
"evidence": "/affected/7/ranges"
}
],
"affected_versions": [
{
"value": "1.7.0-1",
"evidence": "/affected/7/versions"
},
{
"value": "1.7.0-2",
"evidence": "/affected/7/versions"
},
{
"value": "1.7.0-3",
"evidence": "/affected/7/versions"
},
{
"value": "1.7.0-3ubuntu0.1",
"evidence": "/affected/7/versions"
}
]
},
{
"name": {
"value": "ruby-webrick",
"evidence": "/affected/8/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.8.1-1ubuntu0.2",
"evidence": "/affected/8/ranges"
}
],
"affected_versions": [
{
"value": "1.8.1-1",
"evidence": "/affected/8/versions"
},
{
"value": "1.8.1-1ubuntu0.1",
"evidence": "/affected/8/versions"
}
]
},
{
"name": {
"value": "ruby-webrick",
"evidence": "/affected/9/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.9.1-1",
"evidence": "/affected/9/ranges"
}
],
"affected_versions": [
{
"value": "1.8.1-1ubuntu1",
"evidence": "/affected/9/versions"
}
]
},
{
"name": {
"value": "ruby-webrick",
"evidence": "/affected/10/package/name"
},
"prerequisites": [],
"fixed_versions": [
{
"value": "1.9.1-1",
"evidence": "/affected/10/ranges"
}
],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2025-6442",
"aliases": [
"UBUNTU-CVE-2025-6442"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:N"
},
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jruby",
"purl": "pkg:deb/ubuntu/jruby?arch=source&distro=esm-infra-legacy%2Ftrusty",
"ecosystem": "Ubuntu:Pro:14.04:LTS"
},
"versions": [
"1.5.6-5ubuntu1",
"1.5.6-6",
"1.5.6-7",
"1.5.6-9+deb8u2build0.14.04.1~esm2"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "jruby",
"binary_version": "1.5.6-9+deb8u2build0.14.04.1~esm2"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.3.1-2~ubuntu16.04.16+esm11"
}
]
}
],
"package": {
"name": "ruby2.3",
"purl": "pkg:deb/ubuntu/ruby2.3?arch=source&distro=esm-infra%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"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",
"2.3.1-2~ubuntu16.04.16+esm2",
"2.3.1-2~ubuntu16.04.16+esm3",
"2.3.1-2~ubuntu16.04.16+esm4",
"2.3.1-2~ubuntu16.04.16+esm5",
"2.3.1-2~ubuntu16.04.16+esm6",
"2.3.1-2~ubuntu16.04.16+esm7",
"2.3.1-2~ubuntu16.04.16+esm8",
"2.3.1-2~ubuntu16.04.16+esm9",
"2.3.1-2~ubuntu16.04.16+esm10"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libruby2.3",
"binary_version": "2.3.1-2~ubuntu16.04.16+esm11"
},
{
"binary_name": "ruby2.3",
"binary_version": "2.3.1-2~ubuntu16.04.16+esm11"
},
{
"binary_name": "ruby2.3-tcltk",
"binary_version": "2.3.1-2~ubuntu16.04.16+esm11"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jruby",
"purl": "pkg:deb/ubuntu/jruby?arch=source&distro=xenial",
"ecosystem": "Ubuntu:16.04:LTS"
},
"versions": [
"1.7.21-2ubuntu4",
"1.7.22-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "jruby",
"binary_version": "1.7.22-1ubuntu1"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.5.1-1ubuntu1.16+esm6"
}
]
}
],
"package": {
"name": "ruby2.5",
"purl": "pkg:deb/ubuntu/ruby2.5?arch=source&distro=esm-infra%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"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",
"2.5.1-1ubuntu1.11",
"2.5.1-1ubuntu1.12",
"2.5.1-1ubuntu1.13",
"2.5.1-1ubuntu1.14",
"2.5.1-1ubuntu1.15",
"2.5.1-1ubuntu1.16",
"2.5.1-1ubuntu1.16+esm1",
"2.5.1-1ubuntu1.16+esm3",
"2.5.1-1ubuntu1.16+esm4",
"2.5.1-1ubuntu1.16+esm5"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libruby2.5",
"binary_version": "2.5.1-1ubuntu1.16+esm6"
},
{
"binary_name": "ruby2.5",
"binary_version": "2.5.1-1ubuntu1.16+esm6"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jruby",
"purl": "pkg:deb/ubuntu/jruby?arch=source&distro=bionic",
"ecosystem": "Ubuntu:18.04:LTS"
},
"versions": [
"9.1.13.0-1",
"9.1.17.0-1~18.04"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "jruby",
"binary_version": "9.1.17.0-1~18.04"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "2.7.0-5ubuntu1.18+esm3"
}
]
}
],
"package": {
"name": "ruby2.7",
"purl": "pkg:deb/ubuntu/ruby2.7?arch=source&distro=esm-infra%2Ffocal",
"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"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",
"2.7.0-5ubuntu1.6",
"2.7.0-5ubuntu1.7",
"2.7.0-5ubuntu1.8",
"2.7.0-5ubuntu1.9",
"2.7.0-5ubuntu1.10",
"2.7.0-5ubuntu1.11",
"2.7.0-5ubuntu1.12",
"2.7.0-5ubuntu1.13",
"2.7.0-5ubuntu1.14",
"2.7.0-5ubuntu1.15",
"2.7.0-5ubuntu1.16",
"2.7.0-5ubuntu1.17",
"2.7.0-5ubuntu1.18",
"2.7.0-5ubuntu1.18+esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "libruby2.7",
"binary_version": "2.7.0-5ubuntu1.18+esm3"
},
{
"binary_name": "ruby2.7",
"binary_version": "2.7.0-5ubuntu1.18+esm3"
}
],
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
}
]
}
],
"package": {
"name": "jruby",
"purl": "pkg:deb/ubuntu/jruby?arch=source&distro=focal",
"ecosystem": "Ubuntu:20.04:LTS"
},
"versions": [
"9.1.17.0-3",
"9.1.17.0-3build5",
"9.1.17.0-3build6"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "jruby",
"binary_version": "9.1.17.0-3build6"
}
]
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.7.0-3ubuntu0.2"
}
]
}
],
"package": {
"name": "ruby-webrick",
"purl": "pkg:deb/ubuntu/ruby-webrick?arch=source&distro=jammy",
"ecosystem": "Ubuntu:22.04:LTS"
},
"versions": [
"1.7.0-1",
"1.7.0-2",
"1.7.0-3",
"1.7.0-3ubuntu0.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-webrick",
"binary_version": "1.7.0-3ubuntu0.2"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.8.1-1ubuntu0.2"
}
]
}
],
"package": {
"name": "ruby-webrick",
"purl": "pkg:deb/ubuntu/ruby-webrick?arch=source&distro=noble",
"ecosystem": "Ubuntu:24.04:LTS"
},
"versions": [
"1.8.1-1",
"1.8.1-1ubuntu0.1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-webrick",
"binary_version": "1.8.1-1ubuntu0.2"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.9.1-1"
}
]
}
],
"package": {
"name": "ruby-webrick",
"purl": "pkg:deb/ubuntu/ruby-webrick?arch=source&distro=questing",
"ecosystem": "Ubuntu:25.10"
},
"versions": [
"1.8.1-1ubuntu1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-webrick",
"binary_version": "1.9.1-1"
}
],
"availability": "No subscription required"
}
},
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"fixed": "1.9.1-1"
}
]
}
],
"package": {
"name": "ruby-webrick",
"purl": "pkg:deb/ubuntu/ruby-webrick?arch=source&distro=resolute",
"ecosystem": "Ubuntu:26.04:LTS"
},
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2025/UBUNTU-CVE-2025-6442.json"
},
"ecosystem_specific": {
"binaries": [
{
"binary_name": "ruby-webrick",
"binary_version": "1.9.1-1"
}
],
"availability": "No subscription required"
}
}
],
"modified": "2026-10-08T12:53:26.800725743Z",
"provider": "osv",
"upstream": [
"CVE-2025-6442"
],
"references": [
"https://ubuntu.com/security/CVE-2025-6442",
"https://www.cve.org/CVERecord?id=CVE-2025-6442",
"https://www.zerodayinitiative.com/advisories/ZDI-25-414/",
"https://ubuntu.com/security/notices/USN-7709-1",
"https://ubuntu.com/security/notices/USN-7840-1"
]
},
"related_cves": [
{
"value": "CVE-2025-6442",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 99568,
"published_at": "2025-06-25T17:15:00+00:00"
}