openEuler 20.03 LTS SP1 update for qemu

1) NULL pointer dereference

EUVDB-ID: #VU29545

Risk: Low

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

CVE-ID: CVE-2020-15469

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 QEMU. A remote attacker can trigger the MemoryRegionOps object to lack read/write callback methods, leading to a NULL pointer dereference.

Mitigation

Install updates from vendor's repository.

Vulnerable software versions

openEuler: 20.03 LTS SP1

qemu-seabios: before 4.1.0-46

qemu-help: before 4.1.0-46

qemu-guest-agent: before 4.1.0-46

qemu-img: before 4.1.0-46

qemu-block-ssh: before 4.1.0-46

qemu-block-iscsi: before 4.1.0-46

qemu-debugsource: before 4.1.0-46

qemu-debuginfo: before 4.1.0-46

qemu-block-rbd: before 4.1.0-46

qemu: before 4.1.0-46

External links

http://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2021-1211

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