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RHSA-2020:1216

Vulnerability from csaf_redhat - Published: 2020-03-31 14:36 - Updated: 2026-06-28 09:02
Summary
Red Hat Security Advisory: qemu-kvm-rhev security, bug fix, and enhancement update
Severity
Important
Notes
Topic: An update for qemu-kvm-rhev is now available for Red Hat Virtualization 4 for Red Hat Enterprise Linux 7 and Red Hat Virtualization Engine 4.3. 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: 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: slirp: heap buffer overflow during packet reassembly (CVE-2019-14378) * QEMU: block: iscsi: OOB heap access via an unexpected response of iSCSI Server (CVE-2020-1711) * QEMU: qxl: null pointer dereference while releasing spice resources (CVE-2019-12155) 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): * After host update, older windows clients have large time drift (BZ#1639098) * [v2v] Migration performance regression (BZ#1648622) * Live storage migration fails with: TimeoutError: Timed out during operation: cannot acquire state change lock (held by monitor=remoteDispatchConnectGetAllDomainStats) and the VM becomes 'Not Responding' (BZ#1665256) * QEMU gets stuck on resume/cont call from libvirt (BZ#1673546) * [Intel 7.8 Bug] [KVM][CLX] CPUID_7_0_EDX_ARCH_CAPABILITIES is not enabled in VM qemu-kvm-rhev (BZ#1709972) * qemu aborts in blockCommit: qemu-kvm: block.c:3486: bdrv_replace_node: Assertion `!({ _Static_assert(!(sizeof(*&from->in_flight) > 8), "not expecting: " "sizeof(*&from->in_flight) > ATOMIC_REG_SIZE"); __atomic_load_n(&from->in_flight, 0); })' failed. (BZ#1711643) * ccid: Fix incorrect dwProtocol advertisement of T=0 (BZ#1721522) * Fail to migrate a rhel6.10-mt7.6 guest with dimm device (BZ#1724048) * qemu-kvm: backport cpuidle-haltpoll support (BZ#1734502) * qemu, qemu-img fail to detect alignment with XFS and Gluster/XFS on 4k block device (BZ#1743365) * ISST-LTE:RHV4.3 on RHEL7.6 kvm host:Power8:Tuleta-L:lotg7: call traces dumped on guest while performing guest migration (qemu-kvm-rhev) (BZ#1743508) * qemu coredump: qemu-kvm: block/create.c:68: qmp_blockdev_create: Assertion `drv' failed (BZ#1746224) * [Data plane]virtio_scsi_ctx_check: Assertion `blk_get_aio_context(d->conf.blk) == s->ctx' failed when unplug a device that running block stream on it (BZ#1764120) * qemu-kvm crashes when Windows VM is migrated with multiqueue (BZ#1775251) Enhancement(s): * [Intel 7.8 FEAT] MDS_NO exposure to guest - qemu-kvm-rhev (BZ#1716726)
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-2019-12155

interface_release_resource in hw/display/qxl.c in QEMU 3.1.x through 4.0.0 has a NULL pointer dereference.

3.8 (Low)
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:L
CWE-476 - NULL Pointer Dereference
Affected products
Product Identifier Version Remediation
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.12.0-44.el7.ppc64le —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-img-rhev-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.12.0-44.el7.ppc64le —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-common-rhev-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.12.0-44.el7.ppc64le —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.12.0-44.el7.src —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.12.0-44.el7.ppc64le —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-rhev-debuginfo-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.12.0-44.el7.ppc64le —
Vendor Fix fix
Unresolved product id: 7Server-RHEV-4-Agents-7:qemu-kvm-tools-rhev-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-img-rhev-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-common-rhev-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-rhev-10:2.12.0-44.el7.src —
Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-rhev-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-rhev-debuginfo-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Unresolved product id: 7Server-RHV-S-4.3:qemu-kvm-tools-rhev-10:2.12.0-44.el7.x86_64 —
Vendor Fix fix
Threats
Impact Low
CVE-2019-14378

A heap buffer overflow issue was found in the SLiRP networking implementation of the QEMU emulator. This flaw occurs in the ip_reass() routine while reassembling incoming packets if the first fragment is bigger than the m->m_dat[] buffer. An attacker could use this flaw to crash the QEMU process on the host, resulting in a Denial of Service or potentially executing arbitrary code with privileges of the QEMU process.

7.0 (High)
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H
CWE-122 - Heap-based Buffer Overflow
Affected products
Fixed 17 products, the same list as for CVE-2019-12155
Threats
Impact Important
CVE-2020-1711

An out-of-bounds heap buffer access flaw was found in the way the iSCSI Block driver in QEMU handled a response coming from an iSCSI server while checking the status of a Logical Address Block (LBA) in an iscsi_co_block_status() routine. A remote user could use this flaw to crash the QEMU process, resulting in a denial of service or potential execution of arbitrary code with privileges of the QEMU process on the host.

6.0 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:L
CWE-122 - Heap-based Buffer Overflow
Affected products
Fixed 17 products, the same list as for CVE-2019-12155
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2020:1216 self
https://access.redhat.com/security/updates/classi… external
https://bugzilla.redhat.com/show_bug.cgi?id=1648622 external
https://bugzilla.redhat.com/show_bug.cgi?id=1665256 external
https://bugzilla.redhat.com/show_bug.cgi?id=1711643 external
https://bugzilla.redhat.com/show_bug.cgi?id=1712670 external
https://bugzilla.redhat.com/show_bug.cgi?id=1721522 external
https://bugzilla.redhat.com/show_bug.cgi?id=1724048 external
https://bugzilla.redhat.com/show_bug.cgi?id=1734502 external
https://bugzilla.redhat.com/show_bug.cgi?id=1734745 external
https://bugzilla.redhat.com/show_bug.cgi?id=1743365 external
https://bugzilla.redhat.com/show_bug.cgi?id=1746224 external
https://bugzilla.redhat.com/show_bug.cgi?id=1764120 external
https://bugzilla.redhat.com/show_bug.cgi?id=1775251 external
https://bugzilla.redhat.com/show_bug.cgi?id=1794290 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2019-12155 self
https://bugzilla.redhat.com/show_bug.cgi?id=1712670 external
https://www.cve.org/CVERecord?id=CVE-2019-12155 external
https://nvd.nist.gov/vuln/detail/CVE-2019-12155 external
https://access.redhat.com/security/cve/CVE-2019-14378 self
https://bugzilla.redhat.com/show_bug.cgi?id=1734745 external
https://www.cve.org/CVERecord?id=CVE-2019-14378 external
https://nvd.nist.gov/vuln/detail/CVE-2019-14378 external
https://access.redhat.com/security/cve/CVE-2020-1711 self
https://bugzilla.redhat.com/show_bug.cgi?id=1794290 external
https://www.cve.org/CVERecord?id=CVE-2020-1711 external
https://nvd.nist.gov/vuln/detail/CVE-2020-1711 external
Acknowledgments
Ruhr University Bochum Cornelius Aschermann Sergej Schumilo Simon Wrner
Vishnu Dev
nutanix.com Felipe Franciosi Peter Turschmid Raphael Norwitz
To clipboard 

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          "text": "QEMU: slirp: heap buffer overflow during packet reassembly",
          "title": "Vulnerability summary"
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          "text": "Red Hat OpenStack Platform:                                                                                                                 \n* This flaw impacts KVM user-mode or SLIRP networking, which is not used in Red Hat OpenStack Platform. Although updating is recommended for affected versions (see below), Red Hat OpenStack Platform environments are not vulnerable.\n* Because the flaw\u0027s impact is Low, it will not be fixed in Red Hat OpenStack Platform 9 which is retiring within a few weeks of the flaw\u0027s public date.",
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          "category": "external",
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      "release_date": "2019-07-28T00:00:00+00:00",
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          "category": "vendor_fix",
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            "baseSeverity": "HIGH",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:H",
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      "threats": [
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          "category": "impact",
          "details": "Important"
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      "title": "QEMU: slirp: heap buffer overflow during packet reassembly"
    },
    {
      "acknowledgments": [
        {
          "names": [
            "Felipe Franciosi",
            "Peter Turschmid",
            "Raphael Norwitz"
          ],
          "organization": "nutanix.com"
        }
      ],
      "cve": "CVE-2020-1711",
      "cwe": {
        "id": "CWE-122",
        "name": "Heap-based Buffer Overflow"
      },
      "discovery_date": "2020-01-20T00:00:00+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "1794290"
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          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "QEMU: block: iscsi: OOB heap access via an unexpected response of iSCSI Server",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This issue affects the versions of the qemu-kvm package as shipped with Red Hat Enterprise Linux 8, Red Hat OpenStack, Red Hat Virtualization and Red Hat Enterprise Linux Advanced Virtualization 8.",
          "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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          "url": "https://www.cve.org/CVERecord?id=CVE-2020-1711"
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      "threats": [
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          "category": "impact",
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      ],
      "title": "QEMU: block: iscsi: OOB heap access via an unexpected response of iSCSI Server"
    }
  ]
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.