NULL pointer dereference in QEMU - CVE-2020-15469

Vulnerability identifier: #VU29545

CSH Severity: Low

CVSS v4: 7.1 [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]

CVE-ID: CVE-2020-15469

CWE-ID: CWE-476

Exploitation vector: Remote access

Exploit availability: No public exploit available

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.

QEMU
openEuler
qemu
qemu-block-rbd
qemu-debuginfo
qemu-debugsource
qemu-block-iscsi
qemu-block-ssh
qemu-img
qemu-guest-agent
qemu-help
qemu-seabios

Install update from vendor's website.

QEMU - update to 4.2.1
qemu - update to 4.1.0-46
qemu-block-rbd - update to 4.1.0-46
qemu-debuginfo - update to 4.1.0-46
qemu-debugsource - update to 4.1.0-46
qemu-block-iscsi - update to 4.1.0-46
qemu-block-ssh - update to 4.1.0-46
qemu-img - update to 4.1.0-46
qemu-guest-agent - update to 4.1.0-46
qemu-help - update to 4.1.0-46
qemu-seabios - update to 4.1.0-46

• http://www.openwall.com/lists/oss-security/2020/07/02/1
• https://lists.gnu.org/archive/html/qemu-devel/2020-06/msg09961.html

• Denial of service in QEMU
• openEuler 20.03 LTS SP1 update for qemu