ubuntu-cve-2020-21047
Vulnerability from osv_ubuntu
Published
2023-08-22 19:16
Modified
2026-04-22 07:39
Summary
Details
The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks.
Severity
5.5 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "elfutils",
"binary_version": "0.158-0ubuntu5.3+esm1"
},
{
"binary_name": "libasm1",
"binary_version": "0.158-0ubuntu5.3+esm1"
},
{
"binary_name": "libdw1",
"binary_version": "0.158-0ubuntu5.3+esm1"
},
{
"binary_name": "libelf1",
"binary_version": "0.158-0ubuntu5.3+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "elfutils",
"purl": "pkg:deb/ubuntu/elfutils@0.158-0ubuntu5.3+esm1?arch=source\u0026distro=trusty/esm"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.158-0ubuntu5.3+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.157-1ubuntu1",
"0.158-0ubuntu3",
"0.158-0ubuntu4",
"0.158-0ubuntu5",
"0.158-0ubuntu5.1",
"0.158-0ubuntu5.2",
"0.158-0ubuntu5.3"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "elfutils",
"binary_version": "0.165-3ubuntu1.2+esm1"
},
{
"binary_name": "libasm1",
"binary_version": "0.165-3ubuntu1.2+esm1"
},
{
"binary_name": "libdw1",
"binary_version": "0.165-3ubuntu1.2+esm1"
},
{
"binary_name": "libelf1",
"binary_version": "0.165-3ubuntu1.2+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "elfutils",
"purl": "pkg:deb/ubuntu/elfutils@0.165-3ubuntu1.2+esm1?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.165-3ubuntu1.2+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.163-4ubuntu1",
"0.163-5.1",
"0.164-1",
"0.165-3",
"0.165-3ubuntu1",
"0.165-3ubuntu1.1",
"0.165-3ubuntu1.2"
]
},
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "elfutils",
"binary_version": "0.170-0.4ubuntu0.1+esm1"
},
{
"binary_name": "libasm1",
"binary_version": "0.170-0.4ubuntu0.1+esm1"
},
{
"binary_name": "libdw1",
"binary_version": "0.170-0.4ubuntu0.1+esm1"
},
{
"binary_name": "libelf1",
"binary_version": "0.170-0.4ubuntu0.1+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "elfutils",
"purl": "pkg:deb/ubuntu/elfutils@0.170-0.4ubuntu0.1+esm1?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.170-0.4ubuntu0.1+esm1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.170-0.1",
"0.170-0.2",
"0.170-0.3",
"0.170-0.4",
"0.170-0.4ubuntu0.1"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "elfutils",
"binary_version": "0.176-1.1ubuntu0.1"
},
{
"binary_name": "libasm1",
"binary_version": "0.176-1.1ubuntu0.1"
},
{
"binary_name": "libdw1",
"binary_version": "0.176-1.1ubuntu0.1"
},
{
"binary_name": "libelf1",
"binary_version": "0.176-1.1ubuntu0.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "elfutils",
"purl": "pkg:deb/ubuntu/elfutils@0.176-1.1ubuntu0.1?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "0.176-1.1ubuntu0.1"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"0.176-1.1",
"0.176-1.1build1"
]
}
],
"aliases": [],
"details": "The libcpu component which is used by libasm of elfutils version 0.177 (git 47780c9e), suffers from denial-of-service vulnerability caused by application crashes due to out-of-bounds write (CWE-787), off-by-one error (CWE-193) and reachable assertion (CWE-617); to exploit the vulnerability, the attackers need to craft certain ELF files which bypass the missing bound checks.",
"id": "UBUNTU-CVE-2020-21047",
"modified": "2026-04-22T07:39:29Z",
"published": "2023-08-22T19:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-21047"
},
{
"type": "REPORT",
"url": "https://sourceware.org/git/?p=elfutils.git;a=commitdiff;h=99dc63b10b3878616b85df2dfd2e4e7103e414b8"
},
{
"type": "REPORT",
"url": "https://sourceware.org/bugzilla/show_bug.cgi?id=25068"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-6322-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-21047"
}
],
"related": [
"USN-6322-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-21047"
]
}
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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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