ubuntu-cve-2020-29562
Vulnerability from osv_ubuntu
Published
2020-12-04 07:15
Modified
2026-04-22 07:39
Summary
Details
The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.
Severity
4.8 (Medium)
4.8 (Medium)
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "glibc-source",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc-bin",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc-dev-bin",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-amd64",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-armel",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-dev-amd64",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-dev-armel",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-dev-i386",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-dev-s390",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-dev-x32",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-i386",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-lse",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-pic",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-s390",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "libc6-x32",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "locales",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "locales-all",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "multiarch-support",
"binary_version": "2.27-3ubuntu1.5"
},
{
"binary_name": "nscd",
"binary_version": "2.27-3ubuntu1.5"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "glibc",
"purl": "pkg:deb/ubuntu/glibc@2.27-3ubuntu1.5?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.27-3ubuntu1.5"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.26-0ubuntu2",
"2.26-0ubuntu2.1",
"2.27-0ubuntu2",
"2.27-0ubuntu3",
"2.27-3ubuntu1",
"2.27-3ubuntu1.2",
"2.27-3ubuntu1.3",
"2.27-3ubuntu1.4"
]
},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "glibc-source",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc-bin",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc-dev-bin",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-amd64",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-armel",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-dev-amd64",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-dev-armel",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-dev-i386",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-dev-s390",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-dev-x32",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-i386",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-lse",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-pic",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-prof",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-s390",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "libc6-x32",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "locales",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "locales-all",
"binary_version": "2.31-0ubuntu9.7"
},
{
"binary_name": "nscd",
"binary_version": "2.31-0ubuntu9.7"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "glibc",
"purl": "pkg:deb/ubuntu/glibc@2.31-0ubuntu9.7?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "2.31-0ubuntu9.7"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"2.30-0ubuntu2",
"2.30-0ubuntu3",
"2.31-0ubuntu5",
"2.31-0ubuntu6",
"2.31-0ubuntu7",
"2.31-0ubuntu9",
"2.31-0ubuntu9.1",
"2.31-0ubuntu9.2",
"2.31-0ubuntu9.3"
]
}
],
"aliases": [],
"details": "The iconv function in the GNU C Library (aka glibc or libc6) 2.30 to 2.32, when converting UCS4 text containing an irreversible character, fails an assertion in the code path and aborts the program, potentially resulting in a denial of service.",
"id": "UBUNTU-CVE-2020-29562",
"modified": "2026-04-22T07:39:39Z",
"published": "2020-12-04T07:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-29562"
},
{
"type": "REPORT",
"url": "https://sourceware.org/pipermail/libc-alpha/2020-November/119822.html"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-5310-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-29562"
}
],
"related": [
"USN-5310-1"
],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-29562"
]
}
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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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