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amazonAmazonALAS-2021-1467
HistoryJan 12, 2021 - 10:51 p.m.

Medium: qemu-kvm

2021-01-1222:51:00
alas.aws.amazon.com
40
qemu-kvm
use-after-free
denial of service
slirp
networking
cve-2019-15890

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.6

Confidence

High

EPSS

0.015

Percentile

87.0%

Issue Overview:

A use-after-free issue was found in the SLiRP networking implementation of the QEMU emulator. The issue occurs in ip_reass() routine while reassembling incoming packets, if the first fragment is bigger than the m->m_dat[] buffer. A user or process could use this flaw to crash the QEMU process on the host, resulting in a denial of service. (CVE-2019-15890)

Affected Packages:

qemu-kvm

Issue Correction:
Run yum update qemu-kvm to update your system.

New 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  

Additional References

Red Hat: CVE-2019-15890

Mitre: CVE-2019-15890

CVSS2

5

Attack Vector

NETWORK

Attack Complexity

LOW

Authentication

NONE

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

PARTIAL

AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS3

7.5

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

AI Score

7.6

Confidence

High

EPSS

0.015

Percentile

87.0%