openEuler update for qemu



Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-29443
CVE-2021-20203
CWE-ID CWE-125
CWE-190
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 openEuler
Operating systems & Components / Operating system

qemu-seabios
Operating systems & Components / Operating system package or component

qemu-help
Operating systems & Components / Operating system package or component

qemu-debugsource
Operating systems & Components / Operating system package or component

qemu-guest-agent
Operating systems & Components / Operating system package or component

qemu-debuginfo
Operating systems & Components / Operating system package or component

qemu-img
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 2 vulnerabilities.

1) Out-of-bounds read

EUVDB-ID: #VU50042

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-2020-29443

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

Exploit availability: No

Description

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

The vulnerability exists due to a boundary condition within the ide_atapi_cmd_reply_end() function in hw/ide/atapi.c in QEMU. A remote user can create a specially crafted file, trick the victim into opening it, 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 SP1 - 20.03 LTS

qemu-seabios: before 4.1.0-35

qemu-help: before 4.1.0-35

qemu-debugsource: before 4.1.0-35

qemu-guest-agent: before 4.1.0-35

qemu-debuginfo: before 4.1.0-35

qemu-img: before 4.1.0-35

qemu: before 4.1.0-35

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1128


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) Integer overflow

EUVDB-ID: #VU63776

Risk: Low

CVSSv4.0: 1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-20203

CWE-ID: CWE-190 - Integer overflow

Exploit availability: No

Description

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

The vulnerability exists due to integer overflow in the vmxnet3 NIC emulator of the QEMU. A privileged guest user can pass invalid values for the rx/tx queue size or other NIC parameters and perform a denial of service attack.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1 - 20.03 LTS

qemu-seabios: before 4.1.0-35

qemu-help: before 4.1.0-35

qemu-debugsource: before 4.1.0-35

qemu-guest-agent: before 4.1.0-35

qemu-debuginfo: before 4.1.0-35

qemu-img: before 4.1.0-35

qemu: before 4.1.0-35

CPE2.3 External links

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1128


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.



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