Huawei EulerOS: Security Advisory for qemu-kvm (EulerOS-SA-2021-2046)

Published: 2021-07-01 07:40:38
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:L/AC:L/Au:N/C:P/I:P/A:P

Summary:
The remote host is missing an update for the Huawei EulerOS 'qemu-kvm' Linux Distribution Package(s) announced via the EulerOS-SA-2021-2046 advisory.

Detection Method:
Checks if a vulnerable Linux Distribution Package version is present on the target host.

Technical Details:
An out-of-bounds access flaw was found in the Message Signalled Interrupt (MSI-X) device support of QEMU. This issue occurs while performing MSI-X mmio operations when a guest sent address goes beyond the mmio region. A guest user or process may use this flaw to crash the QEMU process resulting in a denial of service.(CVE-2020-13754) hw/ide/pci.c in QEMU before 5.1.1 can trigger a NULL pointer dereference because it lacks a pointer check before an ide_cancel_dma_sync call.(CVE-2020-25743) pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because pci_get_bus() might not return a valid pointer.(CVE-2020-25742) QEMU 5.0.0 has a heap-based Buffer Overflow in flatview_read_continue in exec.c because hw/sd/sdhci.c mishandles a write operation in the SDHC_BLKSIZE case.(CVE-2020-25085) The patch for CVE-2020-17380 and CVE-2020-25085, both involving a heap buffer overflow in the SDHCI controller emulation code of QEMU, was found to be incomplete. A malicious privileged guest could reproduce the same issues with specially crafted input, inducing a bogus transfer and subsequent out-of-bounds read/write access in sdhci_do_adma() or sdhci_sdma_transfer_multi_blocks(). CVE-2021-3409 was assigned to facilitate the tracking and backporting of the new patch.(CVE-2021-3409) A use-after-free flaw was found in the MegaRAID emulator of QEMU. This issue occurs while processing SCSI I/O requests in the case of an error mptsas_free_request() that does not dequeue the request object 'req' from a pending requests queue. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service.(CVE-2021-3392) A potential stack overflow via infinite loop issue was found in various NIC emulators of QEMU. The issue occurs in loopback mode of a NIC wherein reentrant DMA checks get bypassed. A guest user/process may use this flaw to consume CPU cycles or crash the QEMU process on the host resulting in DoS scenario.(CVE-2021-3416)

Affected Versions:
'qemu-kvm' Linux Distribution Package(s) on Huawei EulerOS Virtualization 3.0.6.6.

Recommendations:
Please install the updated Linux Distribution Package(s).

Solution Type:
Vendor Patch

Detection Type:
Linux Distribution Package

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2019-20382
https://nvd.nist.gov/vuln/detail/CVE-2020-13754
https://nvd.nist.gov/vuln/detail/CVE-2020-25085
https://nvd.nist.gov/vuln/detail/CVE-2020-25742
https://nvd.nist.gov/vuln/detail/CVE-2020-25743
https://nvd.nist.gov/vuln/detail/CVE-2021-3392
https://nvd.nist.gov/vuln/detail/CVE-2021-3409
https://nvd.nist.gov/vuln/detail/CVE-2021-3416

References:


https://developer.huaweicloud.com/ict/en/site-euleros/euleros/security-advisories/EulerOS-SA-2021-2046

Severity
Medium
CVSS Score
4.6
Published
2021-07-01
Modified
2021-07-02
Category
Huawei EulerOS Local Security Checks

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