Denial of service in QEMU



Risk Low
Patch available YES
Number of vulnerabilities 1
CVE-ID CVE-2018-7858
CWE-ID CWE-125
Exploitation vector Local network
Public exploit N/A
Vulnerable software
 QEMU
Client/Desktop applications / Virtualization software

Vendor QEMU

Security Bulletin

This security bulletin contains one low risk vulnerability.

1) Out-of-bounds read

EUVDB-ID: #VU11134

Risk: Low

CVSSv4.0: 1.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-7858

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

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to cause DoS condition on the target system.

The weakness exists due to improper VGA display updates. An adjacent attacker can use incorrect region calculations during VGA display updates, trigger out-of-bounds read and cause the service to crash.

Mitigation

Install update from vendor's website.

Vulnerable software versions

QEMU: 1.1 - 2.9.3

CPE2.3 External links

https://www.openwall.com/lists/oss-security/2018/03/09/1


Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

How the attacker can exploit this vulnerability?

The attacker would have to trick the victim to open a a specially crafted file.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.



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