SB2020072412 - Multiple vulnerabilities in QEMU 

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Main Vulnerability Database SB2020072412

SB2020072412 - Multiple vulnerabilities in QEMU

Published: July 24, 2020

Security Bulletin ID SB2020072412
Severity
Medium
Patch available
NO
Number of vulnerabilities 10
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

Medium 80% Low 20%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 10 secuirty vulnerabilities.


1) Use-after-free (CVE-ID: CVE-2020-15859)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error in hw/net/e1000e_core.c when processing MMIO operation. A local user on guest operating system can send a specially crafted e1000e packet with the data's address set to the e1000e's MMIO address and crash the QEMU process.



2) Stack-based buffer overflow (CVE-ID: CVE-2020-15863)

The vulnerability allows a local user to execute arbitrary code on the target system with elevated privileges.

The vulnerability exists due to a boundary error when processing packets in xgmac_enet_send() in hw/net/xgmac.c. A local user on the guest operating system can send a specially crafted request to the application, trigger stack-based buffer overflow and execute arbitrary code on the target system with elevated privileges.


3) Infinite loop (CVE-ID: CVE-2020-13800)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to infinite loop in ati-vga in hw/display/ati.c. A local user on the guest operating system can trigger infinite recursion via a crafted mm_index value during an ati_mm_read or ati_mm_write call and perform a denial of service attack against the host system.


4) Out-of-bounds read (CVE-ID: CVE-2020-13791)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in hw/pci/pci.c. A local user on the guest operating system can trigger out-of-bounds read error by providing an address near the end of the PCI configuration space and read contents of memory on the system.


5) Out-of-bounds write (CVE-ID: CVE-2020-13765)

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in rom_copy() in hw/core/loader.c. A local user on the guest operating system can create a specially data to the application, trigger out-of-bounds write and execute arbitrary code on the host system.


6) Reachable Assertion (CVE-ID: CVE-2020-10761)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion in the Network Block Device(NBD) Server. This flaw occurs when an nbd-client sends a spec-compliant request that is near the boundary of maximum permitted request length. A remote nbd-client could use this flaw to crash the qemu-nbd server resulting in a denial of service.


7) NULL pointer dereference (CVE-ID: CVE-2020-13659)

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a NULL pointer dereference error in exec.c, related to BounceBuffer. A local user on the guest operating system can perform a denial of service (DoS) attack against the host system.


8) Out-of-bounds write (CVE-ID: CVE-2020-13754)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in hw/pci/msix.c. A local user on the guest operating system can send specially crafted address in an msi-x mmio operation, trick the victim into opening it using the affected software, trigger out-of-bounds write and execute arbitrary code.


9) Out-of-bounds read (CVE-ID: CVE-2020-13362)

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to a boundary condition in megasas_lookup_frame in hw/scsi/megasas.c. A local user on the guest operating system can pass specially crafted message with reply_queue_head field, trigger out-of-bounds read error and read contents of memory on the system.


10) Out-of-bounds write (CVE-ID: CVE-2020-13361)

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing frame count in es1370_transfer_audio in hw/audio/es1370.c. A local user on the guest operating system can send a specially crafted request and execute arbitrary code on the host operating system.


Remediation

Cybersecurity Help is not aware of any official remediation provided by the vendor.

References