RHSA-2019_4360
Vulnerability from csaf_redhat - Published: 2019-12-23 08:55 - Updated: 2024-11-22 14:19Summary
Red Hat Security Advisory: libyang security update
Severity
Important
Notes
Topic: An update for libyang is now available for Red Hat Enterprise Linux 8.
Red Hat Product Security has rated this update as having a security impact of Important. 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 libyang package provides a library for YANG data modeling language. libyang is a YANG data modelling language parser and toolkit written (and providing API) in C. The library is used e.g. in libnetconf2, Netopeer2, sysrepo and FRRouting projects.
Security Fix(es):
* libyang: stack-based buffer overflow in make_canonical when bits leaf type is used (CVE-2019-19333)
* libyang: stack-based buffer overflow in make_canonical when identityref leaf type is used (CVE-2019-19334)
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.
IMPORTANT:
The libyang-devel sub-package has recently been removed from the AppStream repository. If you have previously installed libyang-devel, remove it prior to applying this advisory to make the update successful.
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.
A stack-based buffer overflow flaw was discovered in the way libyang parses YANG files with a leaf of type "bits". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or execute code.
8.1 (High)
Affected products
Fixed
26 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-0:0.16.105-3.el8_1.2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-0:0.16.105-3.el8_1.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-0:0.16.105-3.el8_1.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-0:0.16.105-3.el8_1.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-0:0.16.105-3.el8_1.2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-0:0.16.105-3.el8_1.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-cpp-debuginfo-0:0.16.105-3.el8_1.2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-cpp-debuginfo-0:0.16.105-3.el8_1.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-cpp-debuginfo-0:0.16.105-3.el8_1.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-cpp-debuginfo-0:0.16.105-3.el8_1.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-cpp-debuginfo-0:0.16.105-3.el8_1.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debuginfo-0:0.16.105-3.el8_1.2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debuginfo-0:0.16.105-3.el8_1.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debuginfo-0:0.16.105-3.el8_1.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debuginfo-0:0.16.105-3.el8_1.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debuginfo-0:0.16.105-3.el8_1.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debugsource-0:0.16.105-3.el8_1.2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debugsource-0:0.16.105-3.el8_1.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debugsource-0:0.16.105-3.el8_1.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debugsource-0:0.16.105-3.el8_1.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:libyang-debugsource-0:0.16.105-3.el8_1.2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:python3-libyang-debuginfo-0:0.16.105-3.el8_1.2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:python3-libyang-debuginfo-0:0.16.105-3.el8_1.2.i686 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:python3-libyang-debuginfo-0:0.16.105-3.el8_1.2.ppc64le | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:python3-libyang-debuginfo-0:0.16.105-3.el8_1.2.s390x | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-8.1.0.Z.MAIN.EUS:python3-libyang-debuginfo-0:0.16.105-3.el8_1.2.x86_64 | — |
Vendor Fix
fix
|
Threats
Impact
Important
A stack-based buffer overflow flaw was discovered in the way libyang parses YANG files with a leaf of type "identityref". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or execute code.
8.1 (High)
Affected products
Fixed
26 products, the same list as for
CVE-2019-19333
Threats
Impact
Important
References
13 references
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"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.",
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"title": "libyang: stack-based buffer overflow in make_canonical when bits leaf type is used"
},
{
"acknowledgments": [
{
"names": [
"Riccardo Schirone"
],
"organization": "Red Hat Product Security",
"summary": "This issue was discovered by Red Hat."
}
],
"cve": "CVE-2019-19334",
"cwe": {
"id": "CWE-121",
"name": "Stack-based Buffer Overflow"
},
"discovery_date": "2019-12-04T00:00:00+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "1779576"
}
],
"notes": [
{
"category": "description",
"text": "A stack-based buffer overflow flaw was discovered in the way libyang parses YANG files with a leaf of type \"identityref\". An application that uses libyang to parse untrusted YANG files may be vulnerable to this flaw, which would allow an attacker to cause a denial of service or execute code.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "libyang: stack-based buffer overflow in make_canonical when identityref leaf type is used",
"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"
}
],
"product_status": {
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{
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}
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"date": "2019-12-23T08:55:03+00:00",
"details": "If you have previously installed libyang-devel, remove it prior to applying this advisory to make the update successful.\n\nFor details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"title": "libyang: stack-based buffer overflow in make_canonical when identityref leaf type is used"
}
]
}
Loading…
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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
- 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.
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.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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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.