Amazon Linux AMI update for qemu-kvm

1) Use-after-free

EUVDB-ID: #VU20964

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2019-15890

CWE-ID: CWE-416 - Use After Free

Exploit availability: No

Description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists in "ip_reass()" routine in "ip_input.c" file while reassembling incoming packets, if the first fragment is bigger than the m->m_dat[] buffer. A remote attacker can send a specially crafted packet and cause the application to crash.

Mitigation

Update the affected packages:

src:
    qemu-kvm-1.5.3-156.25.amzn1.src

x86_64:
    qemu-kvm-1.5.3-156.25.amzn1.x86_64
    qemu-kvm-tools-1.5.3-156.25.amzn1.x86_64
    qemu-kvm-common-1.5.3-156.25.amzn1.x86_64
    qemu-img-1.5.3-156.25.amzn1.x86_64
    qemu-kvm-debuginfo-1.5.3-156.25.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

CPE2.3

• cpe:2.3:o:amazon_web_services:amazon_linux_ami:*:*:*:*:*:*:*:

External links

http://alas.aws.amazon.com/ALAS-2020-1466.html

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.