8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9 High
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.001 Low
EPSS
Percentile
31.5%
Issue Overview:
A heap buffer overflow issue was found in the way SLiRP networking back-end in QEMU processes fragmented packets. It could occur while reassembling the fragmented datagrams of an incoming packet. A privileged user/process inside guest could use this flaw to crash the QEMU process resulting in DoS or potentially leverage it to execute arbitrary code on the host with privileges of the QEMU process.(CVE-2018-11806)
Quick Emulator (QEMU), compiled with the PC System Emulator with multiboot feature support, is vulnerable to an OOB r/w memory access issue. The issue could occur while loading a kernel image during the guest boot, if mh_load_end_addr address is greater than the mh_bss_end_addr address. A user or process could use this flaw to potentially achieve arbitrary code execution on a host.(CVE-2018-7550)
Affected Packages:
qemu-kvm
Note:
This advisory is applicable to Amazon Linux 2 (AL2) Core repository. Visit this FAQ section for the difference between AL2 Core and AL2 Extras advisories.
Issue Correction:
Run yum update qemu-kvm to update your system.
New Packages:
i686:
qemu-img-1.5.3-156.amzn2.5.4.i686
qemu-kvm-debuginfo-1.5.3-156.amzn2.5.4.i686
src:
qemu-kvm-1.5.3-156.amzn2.5.4.src
x86_64:
qemu-kvm-1.5.3-156.amzn2.5.4.x86_64
qemu-img-1.5.3-156.amzn2.5.4.x86_64
qemu-kvm-common-1.5.3-156.amzn2.5.4.x86_64
qemu-kvm-tools-1.5.3-156.amzn2.5.4.x86_64
qemu-kvm-debuginfo-1.5.3-156.amzn2.5.4.x86_64
Red Hat: CVE-2018-11806, CVE-2018-7550
Mitre: CVE-2018-11806, CVE-2018-7550
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Amazon Linux | 2 | i686 | qemu-img | < 1.5.3-156.amzn2.5.4 | qemu-img-1.5.3-156.amzn2.5.4.i686.rpm |
Amazon Linux | 2 | i686 | qemu-kvm-debuginfo | < 1.5.3-156.amzn2.5.4 | qemu-kvm-debuginfo-1.5.3-156.amzn2.5.4.i686.rpm |
Amazon Linux | 2 | x86_64 | qemu-kvm | < 1.5.3-156.amzn2.5.4 | qemu-kvm-1.5.3-156.amzn2.5.4.x86_64.rpm |
Amazon Linux | 2 | x86_64 | qemu-img | < 1.5.3-156.amzn2.5.4 | qemu-img-1.5.3-156.amzn2.5.4.x86_64.rpm |
Amazon Linux | 2 | x86_64 | qemu-kvm-common | < 1.5.3-156.amzn2.5.4 | qemu-kvm-common-1.5.3-156.amzn2.5.4.x86_64.rpm |
Amazon Linux | 2 | x86_64 | qemu-kvm-tools | < 1.5.3-156.amzn2.5.4 | qemu-kvm-tools-1.5.3-156.amzn2.5.4.x86_64.rpm |
Amazon Linux | 2 | x86_64 | qemu-kvm-debuginfo | < 1.5.3-156.amzn2.5.4 | qemu-kvm-debuginfo-1.5.3-156.amzn2.5.4.x86_64.rpm |
8.8 High
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9 High
AI Score
Confidence
High
7.2 High
CVSS2
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:L/AC:L/Au:N/C:C/I:C/A:C
0.001 Low
EPSS
Percentile
31.5%