Vulnerability-Lookup

RHSA-2021:2529

Vulnerability from csaf_redhat - Published: 2021-06-23 14:18 - Updated: 2026-06-28 09:07

Summary

Red Hat Security Advisory: qemu-kvm-rhev security update

Severity

Moderate

Notes

Topic: An update for qemu-kvm-rhev is now available for Red Hat Virtualization for Red Hat Virtualization Host 4.3. 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: KVM (Kernel-based Virtual Machine) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm-rhev packages provide the user-space component for running virtual machines that use KVM in environments managed by Red Hat products. Security Fix(es): * QEMU: ide: atapi: OOB access while processing read commands (CVE-2020-29443) 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.

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.

CVE-2020-29443

An out-of-bounds read-access flaw was found in the ATAPI Emulator of QEMU. This issue occurs while processing the ATAPI read command if the logical block address(LBA) is set to an invalid value. A guest user may use this flaw to crash the QEMU process on the host resulting in a denial of service.

3.9 (Low)


                
                  CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:L

CWE-125 - Out-of-bounds Read

Affected products

Fixed 17 products

Product	Version	Remediation
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.12.0-48.el7_9.3.ppc64le	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.12.0-48.el7_9.3.ppc64le	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.12.0-48.el7_9.3.ppc64le	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.12.0-48.el7_9.3.src	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.12.0-48.el7_9.3.ppc64le	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.12.0-48.el7_9.3.ppc64le	—	Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-img-rhev-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-common-rhev-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-rhev-10:2.12.0-48.el7_9.3.src	—	Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-rhev-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-rhev-debuginfo-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-tools-rhev-10:2.12.0-48.el7_9.3.x86_64	—	Vendor Fix fix

Threats

Impact Moderate

References

9 references

URL	Category
https://access.redhat.com/errata/RHSA-2021:2529	self
https://access.redhat.com/security/updates/classi…	external
https://bugzilla.redhat.com/show_bug.cgi?id=1917446	external
https://security.access.redhat.com/data/csaf/v2/a…	self
https://access.redhat.com/security/cve/CVE-2020-29443	self
https://bugzilla.redhat.com/show_bug.cgi?id=1917446	external
https://www.cve.org/CVERecord?id=CVE-2020-29443	external
https://nvd.nist.gov/vuln/detail/CVE-2020-29443	external
https://www.openwall.com/lists/oss-security/2021/…	external

Acknowledgments

Tencent Blade Team Wenxiang Qian

JSON

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  },
  "vulnerabilities": [
    {
      "acknowledgments": [
        {
          "names": [
            "Wenxiang Qian"
          ],
          "organization": "Tencent Blade Team"
        }
      ],
      "cve": "CVE-2020-29443",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2020-11-02T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1917446"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "An out-of-bounds read-access flaw was found in the ATAPI Emulator of QEMU. This issue occurs while processing the ATAPI read command if the logical block address(LBA) is set to an invalid value. A guest user may use this flaw to crash the QEMU process on the host resulting in a denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "QEMU: ide: atapi: OOB access while processing read commands",
          "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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            "confidentialityImpact": "LOW",
            "integrityImpact": "NONE",
            "privilegesRequired": "HIGH",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:N/A:L",
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "QEMU: ide: atapi: OOB access while processing read commands"
    }
  ]
}

CVE-2020-29443 (GCVE-0-2020-29443)

Vulnerability from cvelistv5 – Published: 2021-01-22 07:05 – Updated: 2024-08-04 16:55

Summary

ide_atapi_cmd_reply_end in hw/ide/atapi.c in QEMU 5.1.0 allows out-of-bounds read access because a buffer index is not validated.

Severity

No CVSS data available.

CWE

Assigner

mitre CNA under the mitre root

CNA scorecard E 29/100 over 2158 records in the last 180 days details

References

5 references

URL	Tags
https://lists.nongnu.org/archive/html/qemu-devel/…	x_refsource_MISC
http://www.openwall.com/lists/oss-security/2021/01/18/2	x_refsource_MISC
https://lists.debian.org/debian-lts-announce/2021…	mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2021030…	x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2022…	mailing-listx_refsource_MLIST

Show details on NVD website

JSON

To clipboard

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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

Order JSON

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.

Publication & reservation Sightings KEV catalogs Other timestamps

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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.

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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