RHSA-2015:1931
Vulnerability from csaf_redhat - Published: 2015-10-26 21:22 - Updated: 2026-06-28 12:26It was found that the QEMU's websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest's VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU.
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: 7Server-RHEV-Agents-7:libcacard-devel-rhev-10:2.1.2-23.el7_1.10.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHEV-Agents-7:libcacard-rhev-10:2.1.2-23.el7_1.10.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHEV-Agents-7:libcacard-tools-rhev-10:2.1.2-23.el7_1.10.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHEV-Agents-7:qemu-img-rhev-10:2.1.2-23.el7_1.10.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.1.2-23.el7_1.10.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.1.2-23.el7_1.10.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.1.2-23.el7_1.10.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.1.2-23.el7_1.10.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: 7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.1.2-23.el7_1.10.x86_64 | — |
Vendor Fix
fix
|
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}
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"cve": "CVE-2015-1779",
"cwe": {
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"name": "Allocation of Resources Without Limits or Throttling"
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"ids": [
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"category": "description",
"text": "It was found that the QEMU\u0027s websocket frame decoder processed incoming frames without limiting resources used to process the header and the payload. An attacker able to access a guest\u0027s VNC console could use this flaw to trigger a denial of service on the host by exhausting all available memory and CPU.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "qemu: vnc: insufficient resource limiting in VNC websockets decoder",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This issue did not affect the kvm and qemu-kvm packages as shipped with Red Hat Enterprise Linux 5 and 6.",
"title": "Statement"
},
{
"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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"7Server-RHEV-Agents-7:qemu-kvm-common-rhev-10:2.1.2-23.el7_1.10.x86_64",
"7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.1.2-23.el7_1.10.src",
"7Server-RHEV-Agents-7:qemu-kvm-rhev-10:2.1.2-23.el7_1.10.x86_64",
"7Server-RHEV-Agents-7:qemu-kvm-rhev-debuginfo-10:2.1.2-23.el7_1.10.x86_64",
"7Server-RHEV-Agents-7:qemu-kvm-tools-rhev-10:2.1.2-23.el7_1.10.x86_64"
]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "qemu: vnc: insufficient resource limiting in VNC websockets decoder"
}
]
}
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.
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
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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.
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.