Amazon Linux AMI update for qemu-kvm



Published: 2021-03-20
Risk Medium
Patch available YES
Number of vulnerabilities 2
CVE-ID CVE-2020-13765
CVE-2020-16092
CWE-ID CWE-787
CWE-617
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) Out-of-bounds write

EUVDB-ID: #VU31806

Risk: Medium

CVSSv3.1: 7.8 [CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-13765

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

Exploit availability: No

Description

The vulnerability allows a remote user to compromise vulnerable system.

The vulnerability exists due to a boundary error when processing untrusted input in rom_copy() in hw/core/loader.c. A local user on the guest operating system can create a specially data to the application, trigger out-of-bounds write and execute arbitrary code on the host system.

Mitigation

Update the affected packages:

src:
    qemu-kvm-1.5.3-156.26.amzn1.src

x86_64:
    qemu-kvm-tools-1.5.3-156.26.amzn1.x86_64
    qemu-kvm-1.5.3-156.26.amzn1.x86_64
    qemu-kvm-debuginfo-1.5.3-156.26.amzn1.x86_64
    qemu-kvm-common-1.5.3-156.26.amzn1.x86_64
    qemu-img-1.5.3-156.26.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2021-1488.html


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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

2) Reachable Assertion

EUVDB-ID: #VU44163

Risk: Medium

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-2020-16092

CWE-ID: CWE-617 - Reachable Assertion

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to a reachable assertion when processing certain network packets on "e1000e" and "vmxnet3" devices in net_tx_pkt_add_raw_fragment() in hw/net/net_tx_pkt.c. A remote attacker on a guest operating system can send a specially crafted packet that will result in hypervisor crash.

Mitigation

Update the affected packages:

src:
    qemu-kvm-1.5.3-156.26.amzn1.src

x86_64:
    qemu-kvm-tools-1.5.3-156.26.amzn1.x86_64
    qemu-kvm-1.5.3-156.26.amzn1.x86_64
    qemu-kvm-debuginfo-1.5.3-156.26.amzn1.x86_64
    qemu-kvm-common-1.5.3-156.26.amzn1.x86_64
    qemu-img-1.5.3-156.26.amzn1.x86_64

Vulnerable software versions

Amazon Linux AMI: All versions

External links

http://alas.aws.amazon.com/ALAS-2021-1488.html


Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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



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