USN-6409-1 (UBUNTU-CVE-2023-4527)
Vulnerability from osv_ubuntu – Published: 2023-10-03 18:04 – Updated: 2026-04-22 07:37 – Source website
VLAI
Summary
glibc vulnerabilities
Details
It was discovered that the GNU C Library incorrectly handled the GLIBC_TUNABLES environment variable. An attacker could possibly use this issue to perform a privilege escalation attack. (CVE-2023-4911)
It was discovered that the GNU C Library incorrectly handled certain DNS responses when the system was configured in no-aaaa mode. A remote attacker could possibly use this issue to cause the GNU C Library to crash, resulting in a denial of service. This issue only affected Ubuntu 23.04. (CVE-2023-4527)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2023-4911",
"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"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"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"
}
]
},
"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"
]
}
],
"aliases": [],
"details": "It was discovered that the GNU C Library incorrectly handled the\nGLIBC_TUNABLES environment variable. An attacker could possibly use this\nissue to perform a privilege escalation attack. (CVE-2023-4911)\n\nIt was discovered that the GNU C Library incorrectly handled certain DNS\nresponses when the system was configured in no-aaaa mode. A remote attacker\ncould possibly use this issue to cause the GNU C Library to crash,\nresulting in a denial of service. This issue only affected Ubuntu 23.04.\n(CVE-2023-4527)\n",
"id": "USN-6409-1",
"modified": "2026-04-22T07:37:06Z",
"published": "2023-10-03T18:04:23Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6409-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-4527"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2023-4911"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "glibc vulnerabilities",
"upstream": [
"UBUNTU-CVE-2023-4527",
"UBUNTU-CVE-2023-4911"
]
}
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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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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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