RHSA-2020_4479
Vulnerability from csaf_redhat - Published: 2020-11-04 02:12 - Updated: 2024-11-22 14:57Summary
Red Hat Security Advisory: libxml2 security update
Severity
Moderate
Notes
Topic: An update for libxml2 is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: The libxml2 library is a development toolbox providing the implementation of various XML standards.
Security Fix(es):
* libxml2: memory leak in xmlParseBalancedChunkMemoryRecover in parser.c (CVE-2019-19956)
* libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c (CVE-2019-20388)
* libxml2: infinite loop in xmlStringLenDecodeEntities in some end-of-file situations (CVE-2020-7595)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Additional Changes:
For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes linked from the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
xmlParseBalancedChunkMemoryRecover in parser.c in libxml2 before 2.9.10 has a memory leak related to newDoc->oldNs.
7.5 (High)
Affected products
Fixed
60 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-0:2.9.7-8.el8.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:python3-libxml2-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:python3-libxml2-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:python3-libxml2-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:python3-libxml2-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-0:2.9.7-8.el8.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debuginfo-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-debugsource-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:libxml2-devel-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:python3-libxml2-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:python3-libxml2-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:python3-libxml2-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:python3-libxml2-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: BaseOS-8.3.0.GA:python3-libxml2-debuginfo-0:2.9.7-8.el8.x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Moderate
A memory leak was found in the xmlSchemaValidateStream function of libxml2. Applications that use this library may be vulnerable to memory not being freed leading to a denial of service. System availability is the highest threat from this vulnerability.
7.5 (High)
Affected products
Fixed
60 products, the same list as for
CVE-2019-19956
Threats
Impact
Moderate
xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file situation.
7.5 (High)
Affected products
Fixed
60 products, the same list as for
CVE-2019-19956
Threats
Impact
Moderate
References
19 references
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{
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"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
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},
{
"category": "external",
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"url": "https://nvd.nist.gov/vuln/detail/CVE-2019-19956"
}
],
"release_date": "2020-01-08T00:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2020-11-04T02:12:23+00:00",
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"title": "libxml2: memory leak in xmlParseBalancedChunkMemoryRecover in parser.c"
},
{
"cve": "CVE-2019-20388",
"cwe": {
"id": "CWE-401",
"name": "Missing Release of Memory after Effective Lifetime"
},
"discovery_date": "2020-02-06T00:00:00+00:00",
"ids": [
{
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"text": "1799734"
}
],
"notes": [
{
"category": "description",
"text": "A memory leak was found in the xmlSchemaValidateStream function of libxml2. Applications that use this library may be vulnerable to memory not being freed leading to a denial of service. System availability is the highest threat from this vulnerability.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"cvss_v3": {
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"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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}
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"title": "libxml2: memory leak in xmlSchemaPreRun in xmlschemas.c"
},
{
"cve": "CVE-2020-7595",
"cwe": {
"id": "CWE-835",
"name": "Loop with Unreachable Exit Condition (\u0027Infinite Loop\u0027)"
},
"discovery_date": "2020-02-06T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1799786"
}
],
"notes": [
{
"category": "description",
"text": "xmlStringLenDecodeEntities in parser.c in libxml2 2.9.10 has an infinite loop in a certain end-of-file situation.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libxml2: infinite loop in xmlStringLenDecodeEntities in some end-of-file situations",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
],
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{
"category": "self",
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"url": "https://access.redhat.com/security/cve/CVE-2020-7595"
},
{
"category": "external",
"summary": "RHBZ#1799786",
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{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2020-7595",
"url": "https://www.cve.org/CVERecord?id=CVE-2020-7595"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2020-7595",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-7595"
}
],
"release_date": "2020-01-21T00:00:00+00:00",
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{
"category": "vendor_fix",
"date": "2020-11-04T02:12:23+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258\n\nThe desktop must be restarted (log out, then log back in) for this update to take effect.",
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],
"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2020:4479"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "libxml2: infinite loop in xmlStringLenDecodeEntities in some end-of-file situations"
}
]
}
Loading…
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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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