usn-3917-1
Vulnerability from osv_ubuntu
Published
2019-03-21 20:46
Modified
2026-02-10 04:41
Summary
snapd vulnerability
Details
The snapd default seccomp filter for strict mode snaps blocks the use of the ioctl() system call when used with TIOCSTI as the second argument to the system call. Jann Horn discovered that this restriction could be circumvented on 64 bit architectures. A malicious snap could exploit this to bypass intended access restrictions to insert characters into the terminal's input queue. On Ubuntu, snapd typically will have already automatically refreshed itself to snapd 2.37.4 which is unaffected.
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2019-7303",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:14.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.37.4~14.04.1"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.37.4~14.04.1"
},
{
"binary_name": "snap-confine",
"binary_version": "2.37.4~14.04.1"
},
{
"binary_name": "snapd",
"binary_version": "2.37.4~14.04.1"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.37.4~14.04.1"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.37.4~14.04.1"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.37.4~14.04.1"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.37.4~14.04.1"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.37.4~14.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.37.4~14.04.1?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.37.4~14.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.21~14.04.2",
"2.22.2~14.04",
"2.22.3~14.04",
"2.22.6~14.04",
"2.23.1~14.04",
"2.24.1~14.04",
"2.25~14.04",
"2.26.10~14.04",
"2.27.5~14.04",
"2.28.5~14.04",
"2.29.4.2~14.04",
"2.32.3.2~14.04",
"2.32.9~14.04",
"2.33.1~14.04",
"2.34.2~14.04",
"2.34.2~14.04.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2019-7303",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.37.4ubuntu0.1"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.37.4ubuntu0.1"
},
{
"binary_name": "snap-confine",
"binary_version": "2.37.4ubuntu0.1"
},
{
"binary_name": "snapd",
"binary_version": "2.37.4ubuntu0.1"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.37.4ubuntu0.1"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.37.4ubuntu0.1"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.37.4ubuntu0.1"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.37.4ubuntu0.1"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.37.4ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.37.4ubuntu0.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.37.4ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.9",
"1.9.1.1",
"1.9.2",
"2.0",
"2.0.1",
"2.0.2",
"2.0.3",
"2.0.5",
"2.0.8",
"2.0.9",
"2.0.10",
"2.11+0.16.04",
"2.12+0.16.04",
"2.13",
"2.14.2~16.04",
"2.15.2ubuntu1",
"2.16ubuntu3",
"2.17.1ubuntu1",
"2.20.1ubuntu1",
"2.21",
"2.22.2",
"2.22.3",
"2.22.6",
"2.23.1",
"2.24.1",
"2.25",
"2.26.10",
"2.27.5",
"2.28.5",
"2.29.4.2",
"2.32.3.2",
"2.32.9",
"2.33.1ubuntu2",
"2.34.2",
"2.34.2ubuntu0.1",
"2.37.4"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2019-7303",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.0/AV:L/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "golang-github-snapcore-snapd-dev",
"binary_version": "2.37.4+18.04.1"
},
{
"binary_name": "golang-github-ubuntu-core-snappy-dev",
"binary_version": "2.37.4+18.04.1"
},
{
"binary_name": "snap-confine",
"binary_version": "2.37.4+18.04.1"
},
{
"binary_name": "snapd",
"binary_version": "2.37.4+18.04.1"
},
{
"binary_name": "snapd-xdg-open",
"binary_version": "2.37.4+18.04.1"
},
{
"binary_name": "ubuntu-core-launcher",
"binary_version": "2.37.4+18.04.1"
},
{
"binary_name": "ubuntu-core-snapd-units",
"binary_version": "2.37.4+18.04.1"
},
{
"binary_name": "ubuntu-snappy",
"binary_version": "2.37.4+18.04.1"
},
{
"binary_name": "ubuntu-snappy-cli",
"binary_version": "2.37.4+18.04.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "snapd",
"purl": "pkg:deb/ubuntu/snapd@2.37.4+18.04.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.37.4+18.04.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.28.5+17.10",
"2.29.4.1+18.04",
"2.29.4.2+18.04",
"2.31.1+18.04",
"2.32+18.04~pre5",
"2.32+18.04~pre6",
"2.32+18.04",
"2.32.3.2+18.04",
"2.32.5+18.04",
"2.32.8+18.04",
"2.32.9+18.04",
"2.33.1+18.04ubuntu2",
"2.34.2+18.04",
"2.34.2+18.04.1",
"2.37.1+18.04",
"2.37.1.1+18.04",
"2.37.4+18.04"
]
}
],
"aliases": [],
"details": "The snapd default seccomp filter for strict mode snaps blocks the use of\nthe ioctl() system call when used with TIOCSTI as the second argument to\nthe system call. Jann Horn discovered that this restriction could be\ncircumvented on 64 bit architectures. A malicious snap could exploit this\nto bypass intended access restrictions to insert characters into the\nterminal\u0027s input queue. On Ubuntu, snapd typically will have already\nautomatically refreshed itself to snapd 2.37.4 which is unaffected.\n",
"id": "USN-3917-1",
"modified": "2026-02-10T04:41:29Z",
"published": "2019-03-21T20:46:02Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-3917-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-7303"
},
{
"type": "REPORT",
"url": "https://launchpad.net/bugs/1812973"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "snapd vulnerability",
"upstream": [
"UBUNTU-CVE-2019-7303"
]
}
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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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