#VU20499 NULL pointer dereference in QEMU - CVE-2019-12155

Vulnerability identifier: #VU20499

Vulnerability risk: Medium

CVSSv4.0: 4 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2019-12155

CWE-ID: CWE-476

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
QEMU
Client/Desktop applications / Virtualization software

Vendor: QEMU

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 "hw/display/qxl.c". A remote attacker can perform a denial of service (DoS) attack.

Mitigation
Install update from vendor's website.

Vulnerable software versions

QEMU: 4.0.0

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External links
https://www.openwall.com/lists/oss-security/2019/05/22/1
https://lists.gnu.org/archive/html/qemu-devel/2019-05/msg01321.html
https://seclists.org/bugtraq/2019/May/76

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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.