GSD-2021-30560
Vulnerability from gsd - Updated: 2022-02-21 00:00Details
## Summary
Nokogiri v1.13.2 upgrades two of its packaged dependencies:
* vendored libxml2 from v2.9.12 to v2.9.13
* vendored libxslt from v1.1.34 to v1.1.35
Those library versions address the following upstream CVEs:
* libxslt: CVE-2021-30560 (CVSS 8.8, High severity)
* libxml2: CVE-2022-23308 (Unspecified severity, see more information below)
Those library versions also address numerous other issues including performance
improvements, regression fixes, and bug fixes, as well as memory leaks and other
use-after-free issues that were not assigned CVEs.
Please note that this advisory only applies to the CRuby implementation of
Nokogiri < 1.13.2, and only if the packaged libraries are being used. If you've
overridden defaults at installation time to use system libraries instead of
packaged libraries, you should instead pay attention to your distro's `libxml2`
and `libxslt` release announcements.
## Mitigation
Upgrade to Nokogiri >= 1.13.2.
Users who are unable to upgrade Nokogiri may also choose a more complicated
mitigation: compile and link an older version Nokogiri against external libraries
libxml2 >= 2.9.13 and libxslt >= 1.1.35, which will also address these same CVEs.
## Impact
* libxslt CVE-2021-30560
* CVSS3 score: 8.8 (High)
Fixed by https://gitlab.gnome.org/GNOME/libxslt/-/commit/50f9c9c
All versions of libxslt prior to v1.1.35 are affected.
Applications using untrusted XSL stylesheets to transform XML are vulnerable to
a denial-of-service attack and should be upgraded immediately.
libxml2 CVE-2022-23308
* As of the time this security advisory was published, there is no officially
published information available about this CVE's severity. The above NIST link
does not yet have a published record, and the libxml2 maintainer has declined
to provide a severity score.
* Fixed by https://gitlab.gnome.org/GNOME/libxml2/-/commit/652dd12
* Further explanation is at https://mail.gnome.org/archives/xml/2022-February/msg00015.html
The upstream commit and the explanation linked above indicate that an application
may be vulnerable to a denial of service, memory disclosure, or code execution if
it parses an untrusted document with parse options `DTDVALID` set to true, and `NOENT`
set to false.
An analysis of these parse options:
* While `NOENT` is off by default for Document, DocumentFragment, Reader, and
Schema parsing, it is on by default for XSLT (stylesheet) parsing in Nokogiri
v1.12.0 and later.
* `DTDVALID` is an option that Nokogiri does not set for any operations, and so
this CVE applies only to applications setting this option explicitly.
It seems reasonable to assume that any application explicitly setting the parse
option `DTDVALID` when parsing untrusted documents is vulnerable and should be
upgraded immediately.
Aliases
Aliases
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"description": "Use after free in Blink XSLT in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.",
"id": "GSD-2021-30560",
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"https://www.suse.com/security/cve/CVE-2021-30560.html",
"https://security.archlinux.org/CVE-2021-30560",
"https://ubuntu.com/security/CVE-2021-30560",
"https://www.debian.org/security/2022/dsa-5216",
"https://advisories.mageia.org/CVE-2021-30560.html"
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"remediation": "unknown",
"reportConfidence": "confirmed",
"type": "vulnerability"
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"name": "nokogiri",
"purl": "pkg:gem/nokogiri"
}
}
],
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"GHSA-fq42-c5rg-92c2"
],
"details": "## Summary\n\nNokogiri v1.13.2 upgrades two of its packaged dependencies:\n\n* vendored libxml2 from v2.9.12 to v2.9.13\n* vendored libxslt from v1.1.34 to v1.1.35\n\nThose library versions address the following upstream CVEs:\n\n* libxslt: CVE-2021-30560 (CVSS 8.8, High severity)\n* libxml2: CVE-2022-23308 (Unspecified severity, see more information below)\n\nThose library versions also address numerous other issues including performance\nimprovements, regression fixes, and bug fixes, as well as memory leaks and other\nuse-after-free issues that were not assigned CVEs.\n\nPlease note that this advisory only applies to the CRuby implementation of\nNokogiri \u003c 1.13.2, and only if the packaged libraries are being used. If you\u0027ve\noverridden defaults at installation time to use system libraries instead of\npackaged libraries, you should instead pay attention to your distro\u0027s `libxml2`\nand `libxslt` release announcements.\n\n## Mitigation\n\nUpgrade to Nokogiri \u003e= 1.13.2.\n\nUsers who are unable to upgrade Nokogiri may also choose a more complicated\nmitigation: compile and link an older version Nokogiri against external libraries\nlibxml2 \u003e= 2.9.13 and libxslt \u003e= 1.1.35, which will also address these same CVEs.\n\n## Impact\n\n* libxslt CVE-2021-30560\n* CVSS3 score: 8.8 (High)\n\nFixed by https://gitlab.gnome.org/GNOME/libxslt/-/commit/50f9c9c\n\nAll versions of libxslt prior to v1.1.35 are affected.\n\nApplications using untrusted XSL stylesheets to transform XML are vulnerable to\na denial-of-service attack and should be upgraded immediately.\n\nlibxml2 CVE-2022-23308\n* As of the time this security advisory was published, there is no officially\npublished information available about this CVE\u0027s severity. The above NIST link\ndoes not yet have a published record, and the libxml2 maintainer has declined\nto provide a severity score.\n* Fixed by https://gitlab.gnome.org/GNOME/libxml2/-/commit/652dd12\n* Further explanation is at https://mail.gnome.org/archives/xml/2022-February/msg00015.html\n\nThe upstream commit and the explanation linked above indicate that an application\nmay be vulnerable to a denial of service, memory disclosure, or code execution if\nit parses an untrusted document with parse options `DTDVALID` set to true, and `NOENT`\nset to false.\n\nAn analysis of these parse options:\n\n* While `NOENT` is off by default for Document, DocumentFragment, Reader, and\nSchema parsing, it is on by default for XSLT (stylesheet) parsing in Nokogiri\nv1.12.0 and later.\n* `DTDVALID` is an option that Nokogiri does not set for any operations, and so\nthis CVE applies only to applications setting this option explicitly.\n\nIt seems reasonable to assume that any application explicitly setting the parse\noption `DTDVALID` when parsing untrusted documents is vulnerable and should be\nupgraded immediately.\n",
"id": "GSD-2021-30560",
"modified": "2022-02-21T00:00:00.000Z",
"published": "2022-02-21T00:00:00.000Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-fq42-c5rg-92c2"
}
],
"related": [
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],
"schema_version": "1.4.0",
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"type": "CVSS_V3"
}
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"github.com/rubysec/ruby-advisory-db": {
"cve": "2021-30560",
"cvss_v3": 8.8,
"date": "2022-02-21",
"description": "## Summary\n\nNokogiri v1.13.2 upgrades two of its packaged dependencies:\n\n* vendored libxml2 from v2.9.12 to v2.9.13\n* vendored libxslt from v1.1.34 to v1.1.35\n\nThose library versions address the following upstream CVEs:\n\n* libxslt: CVE-2021-30560 (CVSS 8.8, High severity)\n* libxml2: CVE-2022-23308 (Unspecified severity, see more information below)\n\nThose library versions also address numerous other issues including performance\nimprovements, regression fixes, and bug fixes, as well as memory leaks and other\nuse-after-free issues that were not assigned CVEs.\n\nPlease note that this advisory only applies to the CRuby implementation of\nNokogiri \u003c 1.13.2, and only if the packaged libraries are being used. If you\u0027ve\noverridden defaults at installation time to use system libraries instead of\npackaged libraries, you should instead pay attention to your distro\u0027s `libxml2`\nand `libxslt` release announcements.\n\n## Mitigation\n\nUpgrade to Nokogiri \u003e= 1.13.2.\n\nUsers who are unable to upgrade Nokogiri may also choose a more complicated\nmitigation: compile and link an older version Nokogiri against external libraries\nlibxml2 \u003e= 2.9.13 and libxslt \u003e= 1.1.35, which will also address these same CVEs.\n\n## Impact\n\n* libxslt CVE-2021-30560\n* CVSS3 score: 8.8 (High)\n\nFixed by https://gitlab.gnome.org/GNOME/libxslt/-/commit/50f9c9c\n\nAll versions of libxslt prior to v1.1.35 are affected.\n\nApplications using untrusted XSL stylesheets to transform XML are vulnerable to\na denial-of-service attack and should be upgraded immediately.\n\nlibxml2 CVE-2022-23308\n* As of the time this security advisory was published, there is no officially\npublished information available about this CVE\u0027s severity. The above NIST link\ndoes not yet have a published record, and the libxml2 maintainer has declined\nto provide a severity score.\n* Fixed by https://gitlab.gnome.org/GNOME/libxml2/-/commit/652dd12\n* Further explanation is at https://mail.gnome.org/archives/xml/2022-February/msg00015.html\n\nThe upstream commit and the explanation linked above indicate that an application\nmay be vulnerable to a denial of service, memory disclosure, or code execution if\nit parses an untrusted document with parse options `DTDVALID` set to true, and `NOENT`\nset to false.\n\nAn analysis of these parse options:\n\n* While `NOENT` is off by default for Document, DocumentFragment, Reader, and\nSchema parsing, it is on by default for XSLT (stylesheet) parsing in Nokogiri\nv1.12.0 and later.\n* `DTDVALID` is an option that Nokogiri does not set for any operations, and so\nthis CVE applies only to applications setting this option explicitly.\n\nIt seems reasonable to assume that any application explicitly setting the parse\noption `DTDVALID` when parsing untrusted documents is vulnerable and should be\nupgraded immediately.\n",
"gem": "nokogiri",
"ghsa": "fq42-c5rg-92c2",
"patched_versions": [
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],
"related": {
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]
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"title": "Update packaged libxml2 (2.9.12 \u2192 2.9.13) and libxslt (1.1.34 \u2192 1.1.35)",
"url": "https://github.com/sparklemotion/nokogiri/security/advisories/GHSA-fq42-c5rg-92c2"
},
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"cwe_ids": [
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"CWE-937"
],
"date": "2022-10-27",
"description": "Use after free in Blink XSLT in Google Chrome prior to 91.0.4472.164 allowed a remote attacker to potentially exploit heap corruption via a crafted HTML page.",
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"identifier": "CVE-2021-30560",
"identifiers": [
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],
"not_impacted": "All versions starting from 1.1.35",
"package_slug": "conan/libxslt",
"pubdate": "2021-08-03",
"solution": "Upgrade to version 1.1.35 or above.",
"title": "Use After Free",
"urls": [
"https://nvd.nist.gov/vuln/detail/CVE-2021-30560",
"https://chromereleases.googleblog.com/2021/07/stable-channel-update-for-desktop.html",
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"uuid": "4efa16aa-d829-4b6c-b073-d2d001f854df"
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
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
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- 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.
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- 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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
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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.