RHSA-2021:0347

Vulnerability from csaf_redhat - Published: 2021-02-02 12:06 - Updated: 2025-11-21 18:20
Summary
Red Hat Security Advisory: qemu-kvm security and bug fix update
Severity
Moderate
Notes
Topic: An update for qemu-kvm is now available for Red Hat Enterprise Linux 7. 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: Kernel-based Virtual Machine (KVM) is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. Security Fix(es): * QEMU: loader: OOB access while loading registered ROM may lead to code execution (CVE-2020-13765) * QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c (CVE-2020-16092) 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. Bug Fix(es): * qemu-kvm FTBFS on rhel7.9 (BZ#1884997)
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-2020-13765

An out-of-bound write access flaw was found in the way QEMU loads ROM contents at boot time. This flaw occurs in the rom_copy() routine while loading the contents of a 32-bit -kernel image into memory. Running an untrusted -kernel image may load contents at arbitrary memory locations, potentially leading to code execution with the privileges of the QEMU process.

5.6 (Medium)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
CWE-787 - Out-of-bounds Write
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. https://access.redhat.com/errata/RHSA-2021:0347
CVE-2020-16092

An assertion failure flaw was found in QEMU in the network packet processing component. This issue affects the "e1000e" and "vmxnet3" network devices. This flaw allows a malicious guest user or process to abort the QEMU process on the host, resulting in a denial of service.

3.8 (Low)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
CWE-617 - Reachable Assertion
Vendor Fix For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 After installing this update, shut down all running virtual machines. Once all virtual machines have shut down, start them again for this update to take effect. https://access.redhat.com/errata/RHSA-2021:0347
References
Acknowledgments
Codesafe Team of Legendsec at Qi'anxin Group Ziming Zhang
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            "7Workstation-7.9.Z:qemu-kvm-debuginfo-10:1.5.3-175.el7_9.3.x86_64",
            "7Workstation-7.9.Z:qemu-kvm-tools-10:1.5.3-175.el7_9.3.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2021:0347"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "LOW",
            "baseScore": 3.8,
            "baseSeverity": "LOW",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L",
            "version": "3.1"
          },
          "products": [
            "7Client-7.9.Z:qemu-img-10:1.5.3-175.el7_9.3.x86_64",
            "7Client-7.9.Z:qemu-kvm-10:1.5.3-175.el7_9.3.src",
            "7Client-7.9.Z:qemu-kvm-10:1.5.3-175.el7_9.3.x86_64",
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            "7Client-7.9.Z:qemu-kvm-tools-10:1.5.3-175.el7_9.3.x86_64",
            "7ComputeNode-optional-7.9.Z:qemu-img-10:1.5.3-175.el7_9.3.x86_64",
            "7ComputeNode-optional-7.9.Z:qemu-kvm-10:1.5.3-175.el7_9.3.src",
            "7ComputeNode-optional-7.9.Z:qemu-kvm-10:1.5.3-175.el7_9.3.x86_64",
            "7ComputeNode-optional-7.9.Z:qemu-kvm-common-10:1.5.3-175.el7_9.3.x86_64",
            "7ComputeNode-optional-7.9.Z:qemu-kvm-debuginfo-10:1.5.3-175.el7_9.3.x86_64",
            "7ComputeNode-optional-7.9.Z:qemu-kvm-tools-10:1.5.3-175.el7_9.3.x86_64",
            "7Server-7.9.Z:qemu-img-10:1.5.3-175.el7_9.3.x86_64",
            "7Server-7.9.Z:qemu-kvm-10:1.5.3-175.el7_9.3.src",
            "7Server-7.9.Z:qemu-kvm-10:1.5.3-175.el7_9.3.x86_64",
            "7Server-7.9.Z:qemu-kvm-common-10:1.5.3-175.el7_9.3.x86_64",
            "7Server-7.9.Z:qemu-kvm-debuginfo-10:1.5.3-175.el7_9.3.x86_64",
            "7Server-7.9.Z:qemu-kvm-tools-10:1.5.3-175.el7_9.3.x86_64",
            "7Workstation-7.9.Z:qemu-img-10:1.5.3-175.el7_9.3.x86_64",
            "7Workstation-7.9.Z:qemu-kvm-10:1.5.3-175.el7_9.3.src",
            "7Workstation-7.9.Z:qemu-kvm-10:1.5.3-175.el7_9.3.x86_64",
            "7Workstation-7.9.Z:qemu-kvm-common-10:1.5.3-175.el7_9.3.x86_64",
            "7Workstation-7.9.Z:qemu-kvm-debuginfo-10:1.5.3-175.el7_9.3.x86_64",
            "7Workstation-7.9.Z:qemu-kvm-tools-10:1.5.3-175.el7_9.3.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Low"
        }
      ],
      "title": "QEMU: reachable assertion failure in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c"
    }
  ]
}


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Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

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.



Detection rules are retrieved from Rulezet.