openEuler 20.03 LTS update for qemu

Published: 2020-08-29

Risk	Medium
Patch available	YES
Number of vulnerabilities	7
CVE-ID	CVE-2020-13800 CVE-2020-13659 CVE-2020-13361 CVE-2020-13362 CVE-2020-13765 CVE-2020-10702 CVE-2020-14364
CWE-ID	CWE-835 CWE-476 CWE-787 CWE-125 CWE-347
Exploitation vector	Local network
Public exploit	Public exploit code for vulnerability #7 is available.
Vulnerable software Subscribe	openEuler Operating systems & Components / Operating system qemu-seabios Operating systems & Components / Operating system package or component qemu-img Operating systems & Components / Operating system package or component qemu-help Operating systems & Components / Operating system package or component qemu-guest-agent Operating systems & Components / Operating system package or component qemu-debugsource Operating systems & Components / Operating system package or component qemu-debuginfo Operating systems & Components / Operating system package or component qemu Operating systems & Components / Operating system package or component
Vendor	openEuler

Security Bulletin

This security bulletin contains information about 7 vulnerabilities.

1) Infinite loop

EUVDB-ID: #VU31808

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

qemu-seabios: before 4.1.0-18

qemu-img: before 4.1.0-18

qemu-help: before 4.1.0-18

qemu-guest-agent: before 4.1.0-18

qemu-debugsource: before 4.1.0-18

qemu-debuginfo: before 4.1.0-18

qemu: before 4.1.0-18

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1061

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) NULL pointer dereference

EUVDB-ID: #VU31804

Risk: Medium

CVSSv3.1: 5.9 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

qemu-seabios: before 4.1.0-18

qemu-img: before 4.1.0-18

qemu-help: before 4.1.0-18

qemu-guest-agent: before 4.1.0-18

qemu-debugsource: before 4.1.0-18

qemu-debuginfo: before 4.1.0-18

qemu: before 4.1.0-18

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1061

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.

3) Out-of-bounds write

EUVDB-ID: #VU31801

Risk: Medium

CVSSv3.1: 7.8 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

qemu-seabios: before 4.1.0-18

qemu-img: before 4.1.0-18

qemu-help: before 4.1.0-18

qemu-guest-agent: before 4.1.0-18

qemu-debugsource: before 4.1.0-18

qemu-debuginfo: before 4.1.0-18

qemu: before 4.1.0-18

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1061

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.

4) Out-of-bounds read

EUVDB-ID: #VU31802

Risk: Low

CVSSv3.1: 3.1 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

qemu-seabios: before 4.1.0-18

qemu-img: before 4.1.0-18

qemu-help: before 4.1.0-18

qemu-guest-agent: before 4.1.0-18

qemu-debugsource: before 4.1.0-18

qemu-debuginfo: before 4.1.0-18

qemu: before 4.1.0-18

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1061

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.

5) Out-of-bounds write

EUVDB-ID: #VU31806

Risk: Medium

CVSSv3.1: 7.8 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

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

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

qemu-seabios: before 4.1.0-18

qemu-img: before 4.1.0-18

qemu-help: before 4.1.0-18

qemu-guest-agent: before 4.1.0-18

qemu-debugsource: before 4.1.0-18

qemu-debuginfo: before 4.1.0-18

qemu: before 4.1.0-18

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1061

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) Improper Verification of Cryptographic Signature

EUVDB-ID: #VU28198

Risk: Low

CVSSv3.1: 3.9 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-10702

CWE-ID: CWE-347 - Improper Verification of Cryptographic Signature

Exploit availability: No

Description

The vulnerability allows a local user to bypass authentication.

The vulnerability exists due to usage of a weak signature algorithm within the /arm/pauth_helper.c in Pointer Authentication support for ARM. A local user can bypass PAuth and gain unauthorized access to resources on the system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

qemu-seabios: before 4.1.0-18

qemu-img: before 4.1.0-18

qemu-help: before 4.1.0-18

qemu-guest-agent: before 4.1.0-18

qemu-debugsource: before 4.1.0-18

qemu-debuginfo: before 4.1.0-18

qemu: before 4.1.0-18

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1061

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.

7) Out-of-bounds write

EUVDB-ID: #VU45985

Risk: Medium

CVSSv3.1: 8.1 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:O/RC:C]

CVE-ID: CVE-2020-14364

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

Exploit availability: Yes

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a boundary error within the USB emulator in QEMU. A remote user with access to guest operating system on the guest operating system can send specially crafted USB packets, trigger out-of-bounds write and execute arbitrary code on the host system.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS

qemu-seabios: before 4.1.0-18

qemu-img: before 4.1.0-18

qemu-help: before 4.1.0-18

qemu-guest-agent: before 4.1.0-18

qemu-debugsource: before 4.1.0-18

qemu-debuginfo: before 4.1.0-18

qemu: before 4.1.0-18

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2020-1061

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. However, proof of concept for this vulnerability is available.