ubuntu-cve-2019-19126
Vulnerability from osv_ubuntu
Published
2019-11-19 22:15
Modified
2026-04-22 07:39
Summary
Details
On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "glibc-source",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc-bin",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc-dev-bin",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-amd64",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-armel",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-dev-amd64",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-dev-armel",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-dev-i386",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-dev-ppc64",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-dev-s390",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-dev-x32",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-i386",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-pic",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-ppc64",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-s390",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "libc6-x32",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "locales",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "locales-all",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "multiarch-support",
"binary_version": "2.23-0ubuntu11.2"
},
{
"binary_name": "nscd",
"binary_version": "2.23-0ubuntu11.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "glibc",
"purl": "pkg:deb/ubuntu/glibc@2.23-0ubuntu11.2?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.23-0ubuntu11.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.21-0ubuntu4",
"2.21-0ubuntu5",
"2.21-0ubuntu6",
"2.23-0ubuntu1",
"2.23-0ubuntu2",
"2.23-0ubuntu3",
"2.23-0ubuntu4",
"2.23-0ubuntu5",
"2.23-0ubuntu6",
"2.23-0ubuntu7",
"2.23-0ubuntu9",
"2.23-0ubuntu10",
"2.23-0ubuntu11"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "glibc-source",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc-bin",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc-dev-bin",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-amd64",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-armel",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-dev-amd64",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-dev-armel",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-dev-i386",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-dev-s390",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-dev-x32",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-i386",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-pic",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-s390",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "libc6-x32",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "locales",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "locales-all",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "multiarch-support",
"binary_version": "2.27-3ubuntu1.2"
},
{
"binary_name": "nscd",
"binary_version": "2.27-3ubuntu1.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "glibc",
"purl": "pkg:deb/ubuntu/glibc@2.27-3ubuntu1.2?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.27-3ubuntu1.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.26-0ubuntu2",
"2.26-0ubuntu2.1",
"2.27-0ubuntu2",
"2.27-0ubuntu3",
"2.27-3ubuntu1"
]
}
],
"aliases": [],
"details": "On the x86-64 architecture, the GNU C Library (aka glibc) before 2.31 fails to ignore the LD_PREFER_MAP_32BIT_EXEC environment variable during program execution after a security transition, allowing local attackers to restrict the possible mapping addresses for loaded libraries and thus bypass ASLR for a setuid program.",
"id": "UBUNTU-CVE-2019-19126",
"modified": "2026-04-22T07:39:11Z",
"published": "2019-11-19T22:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2019-19126"
},
{
"type": "REPORT",
"url": "https://sourceware.org/ml/libc-alpha/2019-11/msg00649.html"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4416-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2019-19126"
}
],
"related": [
"USN-4416-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2019-19126"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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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