Amazon Linux AMI update for qemu-kvm

Published: 2017-12-20

Risk	High
Patch available	YES
Number of vulnerabilities	2
CVE-ID	CVE-2017-14167 CVE-2017-15289
CWE-ID	CWE-119 CWE-787
Exploitation vector	Local network
Public exploit	N/A
Vulnerable software Subscribe	Amazon Linux AMI Operating systems & Components / Operating system
Vendor	Amazon Web Services

Security Bulletin

This security bulletin contains information about 2 vulnerabilities.

1) Memory corruption

EUVDB-ID: #VU12300

Risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-14167

CWE-ID: CWE-119 - Memory corruption

Exploit availability: No

Description

The vulnerability allows an adjacent attacker to execute arbitrary code on the target system.

The weakness exists in the load_multiboot function in hw/i386/multiboot.c due to integer overflow. An adjacent attacker can execute arbitrary code via specially crafted multiboot header address values, which trigger an out-of-bounds write.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation

Update the affected packages.

src:
    qemu-kvm-1.5.3-141.5.amzn1.src

x86_64:
    qemu-kvm-common-1.5.3-141.5.amzn1.x86_64
    qemu-kvm-tools-1.5.3-141.5.amzn1.x86_64
    qemu-img-1.5.3-141.5.amzn1.x86_64
    qemu-kvm-debuginfo-1.5.3-141.5.amzn1.x86_64
    qemu-kvm-1.5.3-141.5.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2017-934.html

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).

Is there known malware, which exploits this vulnerability?

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

2) Out-of-bounds write

EUVDB-ID: #VU11790

Risk: Low

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

CVE-ID: CVE-2017-15289

CWE-ID: CWE-787 - Out-of-bounds write