ubuntu-cve-2023-4911
Vulnerability from osv_ubuntu
Published
2023-10-03 17:00
Modified
2026-04-22 07:45
Summary
Details
A buffer overflow was discovered in the GNU C Library's dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.
Severity
7.8 (High)
7.8 (High)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "glibc-source",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc-bin",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc-dev-bin",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc-devtools",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6-amd64",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6-dev-amd64",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6-dev-i386",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6-dev-s390",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6-dev-x32",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6-i386",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6-prof",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6-s390",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "libc6-x32",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "locales",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "locales-all",
"binary_version": "2.35-0ubuntu3.4"
},
{
"binary_name": "nscd",
"binary_version": "2.35-0ubuntu3.4"
}
],
"priority_reason": "Local privilege escalation in a package that is installed on all Ubuntu instances."
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "glibc",
"purl": "pkg:deb/ubuntu/glibc@2.35-0ubuntu3.4?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.35-0ubuntu3.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.34-0ubuntu3",
"2.35-0ubuntu1",
"2.35-0ubuntu3",
"2.35-0ubuntu3.1",
"2.35-0ubuntu3.3"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "glibc-source",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc-bin",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc-dev-bin",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc-devtools",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6-amd64",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6-dev-amd64",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6-dev-i386",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6-dev-s390",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6-dev-x32",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6-i386",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6-prof",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6-s390",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "libc6-x32",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "locales",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "locales-all",
"binary_version": "2.38-1ubuntu6"
},
{
"binary_name": "nscd",
"binary_version": "2.38-1ubuntu6"
}
],
"priority_reason": "Local privilege escalation in a package that is installed on all Ubuntu instances."
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "glibc",
"purl": "pkg:deb/ubuntu/glibc@2.38-1ubuntu6?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.38-1ubuntu6"
}
],
"type": "ECOSYSTEM"
}
],
"versions": []
}
],
"aliases": [],
"details": "A buffer overflow was discovered in the GNU C Library\u0027s dynamic loader ld.so while processing the GLIBC_TUNABLES environment variable. This issue could allow a local attacker to use maliciously crafted GLIBC_TUNABLES environment variables when launching binaries with SUID permission to execute code with elevated privileges.",
"id": "UBUNTU-CVE-2023-4911",
"modified": "2026-04-22T07:45:07Z",
"published": "2023-10-03T17:00:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-4911"
},
{
"type": "REPORT",
"url": "https://www.qualys.com/2023/10/03/cve-2023-4911/looney-tunables-local-privilege-escalation-glibc-ld-so.txt"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6409-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2023-4911"
},
{
"type": "REPORT",
"url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog"
}
],
"related": [
"USN-6409-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:L/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": "high",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2023-4911"
]
}
Loading…
Loading…
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.
Loading…
Loading…