ubuntu-cve-2026-24061
Vulnerability from osv_ubuntu
Published
2026-01-21 07:16
Modified
2026-02-19 17:34
Summary
Details
telnetd in GNU Inetutils through 2.7 allows remote authentication bypass via a "-f root" value for the USER environment variable.
Severity
9.8 (Critical)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:1.9.4-1ubuntu0.1~esm5"
}
],
"priority_reason": "remote auth bypass"
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:1.9.4-1ubuntu0.1~esm5?arch=source\u0026distro=esm-apps/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:1.9.4-1ubuntu0.1~esm5"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:1.9.4-1",
"2:1.9.4-1build1",
"2:1.9.4-1ubuntu0.1~esm1",
"2:1.9.4-1ubuntu0.1~esm2",
"2:1.9.4-1ubuntu0.1~esm3"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:1.9.4-3ubuntu0.1+esm4"
}
],
"priority_reason": "remote auth bypass"
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:1.9.4-3ubuntu0.1+esm4?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:1.9.4-3ubuntu0.1+esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:1.9.4-2build1",
"2:1.9.4-3",
"2:1.9.4-3ubuntu0.1",
"2:1.9.4-3ubuntu0.1+esm1",
"2:1.9.4-3ubuntu0.1+esm2"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:1.9.4-11ubuntu0.2+esm3"
}
],
"priority_reason": "remote auth bypass"
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:1.9.4-11ubuntu0.2+esm3?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:1.9.4-11ubuntu0.2+esm3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:1.9.4-10build1",
"2:1.9.4-11",
"2:1.9.4-11ubuntu0.1",
"2:1.9.4-11ubuntu0.1+esm1",
"2:1.9.4-11ubuntu0.2",
"2:1.9.4-11ubuntu0.2+esm1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:2.2-2ubuntu0.2"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:2.2-2ubuntu0.2"
}
],
"priority_reason": "remote auth bypass"
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:2.2-2ubuntu0.2?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:2.2-2ubuntu0.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:2.0-1",
"2:2.2-2",
"2:2.2-2ubuntu0.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:2.5-3ubuntu4.1"
},
{
"binary_name": "telnet",
"binary_version": "0.17+2.5-3ubuntu4.1"
},
{
"binary_name": "telnetd",
"binary_version": "0.17+2.5-3ubuntu4.1"
}
],
"priority_reason": "remote auth bypass"
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:2.5-3ubuntu4.1?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:2.5-3ubuntu4.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:2.4-2ubuntu2",
"2:2.4-3ubuntu1",
"2:2.5-3ubuntu1",
"2:2.5-3ubuntu3",
"2:2.5-3ubuntu4"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:2.6-1ubuntu3.1"
},
{
"binary_name": "telnet",
"binary_version": "0.17+2.6-1ubuntu3.1"
},
{
"binary_name": "telnetd",
"binary_version": "0.17+2.6-1ubuntu3.1"
}
],
"priority_reason": "remote auth bypass"
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:2.6-1ubuntu3.1?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:2.6-1ubuntu3.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:2.5-6ubuntu1",
"2:2.6-1ubuntu1",
"2:2.6-1ubuntu3"
]
}
],
"aliases": [],
"details": "telnetd in GNU Inetutils through 2.7 allows remote authentication bypass via a \"-f root\" value for the USER environment variable.",
"id": "UBUNTU-CVE-2026-24061",
"modified": "2026-02-19T17:34:16Z",
"published": "2026-01-21T07:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-24061"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-24061"
},
{
"type": "REPORT",
"url": "https://lists.gnu.org/archive/html/bug-inetutils/2026-01/msg00004.html"
},
{
"type": "REPORT",
"url": "https://www.gnu.org/software/inetutils/"
},
{
"type": "REPORT",
"url": "https://www.openwall.com/lists/oss-security/2026/01/20/2"
},
{
"type": "REPORT",
"url": "https://www.openwall.com/lists/oss-security/2026/01/20/8"
},
{
"type": "REPORT",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-7992-1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-7992-2"
}
],
"related": [
"USN-7992-1",
"USN-7992-2"
],
"schema_version": "1.7.0",
"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": "high",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-24061"
]
}
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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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