Ubuntu update for qemu



| Updated: 2025-04-23
Risk Medium
Patch available YES
Number of vulnerabilities 13
CVE-ID CVE-2020-10756
CVE-2020-10761
CVE-2020-12829
CVE-2020-13253
CVE-2020-13361
CVE-2020-13362
CVE-2020-13659
CVE-2020-13754
CVE-2020-13765
CVE-2020-13800
CVE-2020-14415
CVE-2020-15863
CVE-2020-16092
CWE-ID CWE-125
CWE-617
CWE-190
CWE-787
CWE-476
CWE-835
CWE-369
CWE-121
Exploitation vector Network
Public exploit N/A
Vulnerable software
 Ubuntu
Operating systems & Components / Operating system

qemu-system-x86-xen (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu-system-x86-microvm (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu-system-x86 (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu-system-sparc (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu-system-s390x (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu-system-ppc (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu-system-mips (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu-system-arm (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu-system (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu (Ubuntu package)
Operating systems & Components / Operating system package or component

qemu-system-aarch64 (Ubuntu package)
Operating systems & Components / Operating system package or component

Vendor Canonical Ltd.

Security Bulletin

This security bulletin contains information about 13 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU31746

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-10756

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition in the "icmp6_send_echoreply()" routine while replying to an ICMP echo request. A remote attacker with access to guest operating system can trigger out-of-bounds read error and read contents of memory on the system.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Reachable Assertion

EUVDB-ID: #VU31805

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-10761

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Integer overflow

EUVDB-ID: #VU46318

Risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-12829

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in the SM501 display driver implementation. This flaw occurs in the COPY_AREA macro while handling MMIO write operations through the sm501_2d_engine_write() callback. A remote user could abuse this flaw to crash the QEMU process in sm501_2d_operation() in hw/display/sm501.c on the host, resulting in a denial of service.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Out-of-bounds read

EUVDB-ID: #VU28283

Risk: Medium

CVSSv4.0: 4.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13253

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition in the SD Memory Card emulator while performing block write commands via sdhci_write() in QEMU. A remote user of guest operating system can trigger out-of-bounds read error and crash the QEMU process. 

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Out-of-bounds write

EUVDB-ID: #VU31801

Risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13361

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Out-of-bounds read

EUVDB-ID: #VU31802

Risk: Low

CVSSv4.0: 1.2 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-13362

CWE-ID: CWE-125 - Out-of-bounds read

Exploit availability: No

Description

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.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

7) NULL pointer dereference

EUVDB-ID: #VU31804

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13659

CWE-ID: CWE-476 - NULL Pointer Dereference

Exploit availability: No

Description

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.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Out-of-bounds write

EUVDB-ID: #VU31803

Risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13754

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

9) Out-of-bounds write

EUVDB-ID: #VU31806

Risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13765

CWE-ID: CWE-787 - Out-of-bounds write

Exploit availability: No

Description

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.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

10) Infinite loop

EUVDB-ID: #VU31808

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-13800

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

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.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

11) Division by zero

EUVDB-ID: #VU46316

Risk: Low

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2020-14415

CWE-ID: CWE-369 - Divide By Zero

Exploit availability: No

Description

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

The vulnerability exists due to division by zero error within the oss_write() function in audio/ossaudio.c in QEMU. A remote user can run a specially crafted application to trigger the error and perform a denial if service (DoS) attack.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

12) Stack-based buffer overflow

EUVDB-ID: #VU31799

Risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-15863

CWE-ID: CWE-121 - Stack-based buffer overflow

Exploit availability: No

Description

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.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

13) Reachable Assertion

EUVDB-ID: #VU44163

Risk: Medium

CVSSv4.0: 4.6 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2020-16092

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

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

The vulnerability exists due to a reachable assertion when processing certain network packets on "e1000e" and "vmxnet3" devices in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c. A remote attacker on a guest operating system can send a specially crafted packet that will result in hypervisor crash.

Mitigation

Update the affected package qemu to the latest version.

Vulnerable software versions

Ubuntu: 16.04 - 20.04

qemu-system-x86-xen (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86-microvm (Ubuntu package): before 1:4.2-3ubuntu6.4

qemu-system-x86 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-sparc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-s390x (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-ppc (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-mips (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-arm (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

qemu-system-aarch64 (Ubuntu package): before 1:2.5+dfsg-5ubuntu10.45

CPE2.3 External links

https://ubuntu.com/security/notices/USN-4467-1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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