ubuntu-cve-2020-27771
Vulnerability from osv_ubuntu
Published
2020-12-04 15:15
Modified
2026-04-22 07:39
Summary
Details
In RestoreMSCWarning() of /coders/pdf.c there are several areas where calls to GetPixelIndex() could result in values outside the range of representable for the unsigned char type. The patch casts the return value of GetPixelIndex() to ssize_t type to avoid this bug. This undefined behavior could be triggered when ImageMagick processes a crafted pdf file. Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was demonstrated in this case. This flaw affects ImageMagick versions prior to 7.0.9-0.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"availability": "Available with Ubuntu Pro (Infra-only): https://ubuntu.com/pro",
"binaries": [
{
"binary_name": "imagemagick",
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},
{
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},
{
"binary_name": "imagemagick-common",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libimage-magick-perl",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libimage-magick-q16-perl",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libmagick++-6-headers",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libmagick++-6.q16-5v5",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libmagickcore-6-arch-config",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libmagickcore-6-headers",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libmagickcore-6.q16-2",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libmagickcore-6.q16-2-extra",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libmagickwand-6-headers",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "libmagickwand-6.q16-2",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
},
{
"binary_name": "perlmagick",
"binary_version": "8:6.8.9.9-7ubuntu5.16+esm11"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "imagemagick",
"purl": "pkg:deb/ubuntu/imagemagick@8:6.8.9.9-7ubuntu5.16+esm11?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
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},
{
"fixed": "8:6.8.9.9-7ubuntu5.16+esm11"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
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"8:6.8.9.9-6",
"8:6.8.9.9-6build1",
"8:6.8.9.9-7",
"8:6.8.9.9-7ubuntu1",
"8:6.8.9.9-7ubuntu2",
"8:6.8.9.9-7ubuntu3",
"8:6.8.9.9-7ubuntu4",
"8:6.8.9.9-7ubuntu5",
"8:6.8.9.9-7ubuntu5.1",
"8:6.8.9.9-7ubuntu5.2",
"8:6.8.9.9-7ubuntu5.3",
"8:6.8.9.9-7ubuntu5.4",
"8:6.8.9.9-7ubuntu5.5",
"8:6.8.9.9-7ubuntu5.6",
"8:6.8.9.9-7ubuntu5.7",
"8:6.8.9.9-7ubuntu5.8",
"8:6.8.9.9-7ubuntu5.9",
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"8:6.8.9.9-7ubuntu5.16",
"8:6.8.9.9-7ubuntu5.16+esm1",
"8:6.8.9.9-7ubuntu5.16+esm2",
"8:6.8.9.9-7ubuntu5.16+esm3",
"8:6.8.9.9-7ubuntu5.16+esm4",
"8:6.8.9.9-7ubuntu5.16+esm5",
"8:6.8.9.9-7ubuntu5.16+esm6",
"8:6.8.9.9-7ubuntu5.16+esm7",
"8:6.8.9.9-7ubuntu5.16+esm8",
"8:6.8.9.9-7ubuntu5.16+esm9",
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},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
{
"binary_name": "imagemagick",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "imagemagick-6-common",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "imagemagick-6.q16",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "imagemagick-6.q16hdri",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "imagemagick-common",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libimage-magick-perl",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libimage-magick-q16-perl",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libimage-magick-q16hdri-perl",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagick++-6-headers",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagick++-6.q16-7",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagick++-6.q16hdri-7",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagickcore-6-arch-config",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagickcore-6-headers",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagickcore-6.q16-3",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagickcore-6.q16-3-extra",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagickcore-6.q16hdri-3",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagickcore-6.q16hdri-3-extra",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagickwand-6-headers",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagickwand-6.q16-3",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "libmagickwand-6.q16hdri-3",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
},
{
"binary_name": "perlmagick",
"binary_version": "8:6.9.7.4+dfsg-16ubuntu6.11"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "imagemagick",
"purl": "pkg:deb/ubuntu/imagemagick@8:6.9.7.4+dfsg-16ubuntu6.11?arch=source\u0026distro=bionic"
},
"ranges": [
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"events": [
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"introduced": "0"
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{
"fixed": "8:6.9.7.4+dfsg-16ubuntu6.11"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
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"8:6.9.7.4+dfsg-16ubuntu3",
"8:6.9.7.4+dfsg-16ubuntu4",
"8:6.9.7.4+dfsg-16ubuntu5",
"8:6.9.7.4+dfsg-16ubuntu6",
"8:6.9.7.4+dfsg-16ubuntu6.2",
"8:6.9.7.4+dfsg-16ubuntu6.3",
"8:6.9.7.4+dfsg-16ubuntu6.4",
"8:6.9.7.4+dfsg-16ubuntu6.7",
"8:6.9.7.4+dfsg-16ubuntu6.8",
"8:6.9.7.4+dfsg-16ubuntu6.9"
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},
{
"ecosystem_specific": {
"availability": "No subscription required",
"binaries": [
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"binary_name": "imagemagick",
"binary_version": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
},
{
"binary_name": "imagemagick-6-common",
"binary_version": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
},
{
"binary_name": "imagemagick-6.q16",
"binary_version": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
},
{
"binary_name": "imagemagick-6.q16hdri",
"binary_version": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
},
{
"binary_name": "imagemagick-common",
"binary_version": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
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{
"binary_name": "libimage-magick-perl",
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{
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},
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{
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},
{
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"binary_version": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
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},
{
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"binary_version": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
},
{
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"binary_version": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
},
{
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},
{
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},
{
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"binary_version": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "imagemagick",
"purl": "pkg:deb/ubuntu/imagemagick@8:6.9.10.23+dfsg-2.1ubuntu11.4?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "8:6.9.10.23+dfsg-2.1ubuntu11.4"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"8:6.9.10.23+dfsg-2.1ubuntu3",
"8:6.9.10.23+dfsg-2.1ubuntu8",
"8:6.9.10.23+dfsg-2.1ubuntu9",
"8:6.9.10.23+dfsg-2.1ubuntu10",
"8:6.9.10.23+dfsg-2.1ubuntu11",
"8:6.9.10.23+dfsg-2.1ubuntu11.1",
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]
}
],
"aliases": [],
"details": "In RestoreMSCWarning() of /coders/pdf.c there are several areas where calls to GetPixelIndex() could result in values outside the range of representable for the unsigned char type. The patch casts the return value of GetPixelIndex() to ssize_t type to avoid this bug. This undefined behavior could be triggered when ImageMagick processes a crafted pdf file. Red Hat Product Security marked this as Low severity because although it could potentially lead to an impact to application availability, no specific impact was demonstrated in this case. This flaw affects ImageMagick versions prior to 7.0.9-0.",
"id": "UBUNTU-CVE-2020-27771",
"modified": "2026-04-22T07:39:36Z",
"published": "2020-12-04T15:15:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2020-27771"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-4988-1"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-27771"
},
{
"type": "ADVISORY",
"url": "https://ubuntu.com/security/notices/USN-7068-1"
}
],
"related": [
"USN-4988-1",
"USN-7068-1"
],
"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:L",
"type": "CVSS_V3"
},
{
"score": "low",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2020-27771"
]
}
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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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