ubuntu-cve-2026-28372
Vulnerability from osv_ubuntu
Published
2026-02-27 06:18
Modified
2026-06-08 21:08
Summary
Details
telnetd in GNU inetutils through 2.7 allows privilege escalation that can be exploited by abusing systemd service credentials support added to the login(1) implementation of util-linux in release 2.40. This is related to client control over the CREDENTIALS_DIRECTORY environment variable, and requires an unprivileged local user to create a login.noauth file.
Severity
7.4 (High)
7.8 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:1.9.2-1ubuntu0.1~esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:1.9.2-1ubuntu0.1~esm4?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:1.9.2-1ubuntu0.1~esm4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:1.9.1.306-0a482-1",
"2:1.9.1.363-bbc1-1",
"2:1.9.2-1",
"2:1.9.2-1ubuntu0.1~esm1",
"2:1.9.2-1ubuntu0.1~esm2"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro with Legacy support add-on: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:1.9.4-1ubuntu0.1~esm6"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:1.9.4-1ubuntu0.1~esm6?arch=source\u0026distro=esm-apps-legacy/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:1.9.4-1ubuntu0.1~esm6"
}
],
"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",
"2:1.9.4-1ubuntu0.1~esm5"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:1.9.4-3ubuntu0.1+esm5"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:1.9.4-3ubuntu0.1+esm5?arch=source\u0026distro=esm-apps/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:1.9.4-3ubuntu0.1+esm5"
}
],
"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",
"2:1.9.4-3ubuntu0.1+esm4"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:1.9.4-11ubuntu0.2+esm4"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:1.9.4-11ubuntu0.2+esm4?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:1.9.4-11ubuntu0.2+esm4"
}
],
"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",
"2:1.9.4-11ubuntu0.2+esm3"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:2.2-2ubuntu0.2+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:2.2-2ubuntu0.2+esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:2.2-2ubuntu0.2+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:2.0-1",
"2:2.2-2",
"2:2.2-2ubuntu0.1",
"2:2.2-2ubuntu0.2"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:2.5-3ubuntu4.2"
},
{
"binary_name": "telnet",
"binary_version": "0.17+2.5-3ubuntu4.2"
},
{
"binary_name": "telnetd",
"binary_version": "0.17+2.5-3ubuntu4.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:2.5-3ubuntu4.2?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:2.5-3ubuntu4.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:2.4-2ubuntu2",
"2:2.4-3ubuntu1",
"2:2.5-3ubuntu1",
"2:2.5-3ubuntu3",
"2:2.5-3ubuntu4",
"2:2.5-3ubuntu4.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:2.6-1ubuntu3.2"
},
{
"binary_name": "telnet",
"binary_version": "0.17+2.6-1ubuntu3.2"
},
{
"binary_name": "telnetd",
"binary_version": "0.17+2.6-1ubuntu3.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:2.6-1ubuntu3.2?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:2.6-1ubuntu3.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:2.5-6ubuntu1",
"2:2.6-1ubuntu1",
"2:2.6-1ubuntu3",
"2:2.6-1ubuntu3.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "inetutils-ftp",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-ftpd",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-inetd",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-ping",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-syslogd",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-talk",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-talkd",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-telnet",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-telnetd",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-tools",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "inetutils-traceroute",
"binary_version": "2:2.7-2ubuntu1.1"
},
{
"binary_name": "telnet",
"binary_version": "0.17+2.7-2ubuntu1.1"
},
{
"binary_name": "telnetd",
"binary_version": "0.17+2.7-2ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "inetutils",
"purl": "pkg:deb/ubuntu/inetutils@2:2.7-2ubuntu1.1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2:2.7-2ubuntu1.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2:2.6-1ubuntu3",
"2:2.6-4ubuntu1",
"2:2.7-2ubuntu1"
]
}
],
"aliases": [],
"details": "telnetd in GNU inetutils through 2.7 allows privilege escalation that can be exploited by abusing systemd service credentials support added to the login(1) implementation of util-linux in release 2.40. This is related to client control over the CREDENTIALS_DIRECTORY environment variable, and requires an unprivileged local user to create a login.noauth file.",
"id": "UBUNTU-CVE-2026-28372",
"modified": "2026-06-08T21:08:25Z",
"published": "2026-02-27T06:18:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-28372"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-28372"
},
{
"type": "REPORT",
"url": "https://lists.gnu.org/archive/html/bug-inetutils/2026-02/msg00000.html"
},
{
"type": "REPORT",
"url": "https://git.hadrons.org/cgit/debian/pkgs/inetutils.git/commit/?id=3953943d8296310485f98963883a798545ab9a6c"
},
{
"type": "REPORT",
"url": "https://lists.gnu.org/archive/html/bug-inetutils/2026-02/msg00012.html"
},
{
"type": "REPORT",
"url": "https://www.openwall.com/lists/oss-security/2026/02/24/1"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-8387-1"
}
],
"related": [
"USN-8387-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-28372"
]
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
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