USN-6736-1 (UBUNTU-CVE-2016-9840)
Vulnerability from osv_ubuntu – Published: 2024-04-16 11:43 – Updated: 2026-06-29 10:53 – Source website
VLAI
Summary
klibc vulnerabilities
Details
It was discovered that zlib, vendored in klibc, incorrectly handled pointer arithmetic. An attacker could use this issue to cause klibc to crash or to possibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)
Danilo Ramos discovered that zlib, vendored in klibc, incorrectly handled memory when performing certain deflating operations. An attacker could use this issue to cause klibc to crash or to possibly execute arbitrary code. (CVE-2018-25032)
Evgeny Legerov discovered that zlib, vendored in klibc, incorrectly handled memory when performing certain inflate operations. An attacker could use this issue to cause klibc to crash or to possibly execute arbitrary code. (CVE-2022-37434)
References
{
"affected": [
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2016-9840",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2016-9841",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-25032",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2022-37434",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:14.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "klibc-utils",
"binary_version": "2.0.3-0ubuntu1.14.04.3+esm3"
},
{
"binary_name": "libklibc",
"binary_version": "2.0.3-0ubuntu1.14.04.3+esm3"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "klibc",
"purl": "pkg:deb/ubuntu/klibc@2.0.3-0ubuntu1.14.04.3+esm3?arch=source\u0026distro=trusty/esm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.3-0ubuntu1.14.04.3+esm3"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.1-3.1ubuntu2",
"2.0.2-1ubuntu1",
"2.0.2-1ubuntu2",
"2.0.3-0ubuntu1",
"2.0.3-0ubuntu1.14.04.1",
"2.0.3-0ubuntu1.14.04.2",
"2.0.3-0ubuntu1.14.04.3",
"2.0.3-0ubuntu1.14.04.3+esm2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2016-9840",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2016-9841",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-25032",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2022-37434",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:16.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "klibc-utils",
"binary_version": "2.0.4-8ubuntu1.16.04.4+esm2"
},
{
"binary_name": "libklibc",
"binary_version": "2.0.4-8ubuntu1.16.04.4+esm2"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "klibc",
"purl": "pkg:deb/ubuntu/klibc@2.0.4-8ubuntu1.16.04.4+esm2?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.4-8ubuntu1.16.04.4+esm2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.3-0ubuntu1",
"2.0.4-4",
"2.0.4-6",
"2.0.4-7",
"2.0.4-8",
"2.0.4-8ubuntu1",
"2.0.4-8ubuntu1.16.04.1",
"2.0.4-8ubuntu1.16.04.2",
"2.0.4-8ubuntu1.16.04.3",
"2.0.4-8ubuntu1.16.04.4",
"2.0.4-8ubuntu1.16.04.4+esm1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2016-9840",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2016-9841",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-25032",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2022-37434",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:Pro:18.04:LTS"
}
},
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "klibc-utils",
"binary_version": "2.0.4-9ubuntu2.2+esm1"
},
{
"binary_name": "libklibc",
"binary_version": "2.0.4-9ubuntu2.2+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "klibc",
"purl": "pkg:deb/ubuntu/klibc@2.0.4-9ubuntu2.2+esm1?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.4-9ubuntu2.2+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.4-9ubuntu1",
"2.0.4-9ubuntu2",
"2.0.4-9ubuntu2.1",
"2.0.4-9ubuntu2.2"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2016-9840",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2016-9841",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-25032",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2022-37434",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:20.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "klibc-utils",
"binary_version": "2.0.7-1ubuntu5.2"
},
{
"binary_name": "libklibc",
"binary_version": "2.0.7-1ubuntu5.2"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "klibc",
"purl": "pkg:deb/ubuntu/klibc@2.0.7-1ubuntu5.2?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.7-1ubuntu5.2"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.6-1ubuntu1",
"2.0.6-1ubuntu2",
"2.0.7-1ubuntu1",
"2.0.7-1ubuntu3",
"2.0.7-1ubuntu4",
"2.0.7-1ubuntu5",
"2.0.7-1ubuntu5.1"
]
},
{
"database_specific": {
"cves_map": {
"cves": [
{
"id": "CVE-2016-9840",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2016-9841",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2018-25032",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
},
{
"id": "CVE-2022-37434",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
]
}
],
"ecosystem": "Ubuntu:22.04:LTS"
}
},
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "klibc-utils",
"binary_version": "2.0.10-4ubuntu0.1"
},
{
"binary_name": "libklibc",
"binary_version": "2.0.10-4ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "klibc",
"purl": "pkg:deb/ubuntu/klibc@2.0.10-4ubuntu0.1?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.0.10-4ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.0.8-6.1ubuntu2",
"2.0.10-3",
"2.0.10-4"
]
}
],
"aliases": [],
"details": "It was discovered that zlib, vendored in klibc, incorrectly handled pointer\narithmetic. An attacker could use this issue to cause klibc to crash or to\npossibly execute arbitrary code. (CVE-2016-9840, CVE-2016-9841)\n\nDanilo Ramos discovered that zlib, vendored in klibc, incorrectly handled\nmemory when performing certain deflating operations. An attacker could use\nthis issue to cause klibc to crash or to possibly execute arbitrary code.\n(CVE-2018-25032)\n\nEvgeny Legerov discovered that zlib, vendored in klibc, incorrectly handled\nmemory when performing certain inflate operations. An attacker could use\nthis issue to cause klibc to crash or to possibly execute arbitrary code.\n(CVE-2022-37434)\n",
"id": "USN-6736-1",
"modified": "2026-06-29T10:53:08Z",
"published": "2024-04-16T11:43:39Z",
"references": [
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6736-1"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2016-9840"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2016-9841"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2018-25032"
},
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2022-37434"
}
],
"related": [],
"schema_version": "1.7.0",
"summary": "klibc vulnerabilities",
"upstream": [
"UBUNTU-CVE-2016-9840",
"UBUNTU-CVE-2016-9841",
"UBUNTU-CVE-2018-25032",
"UBUNTU-CVE-2022-37434"
]
}
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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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