CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
AI Score
Confidence
Low
EPSS
Percentile
17.2%
Issue Overview:
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the bootp_input() function and could occur while processing a udp packet that is smaller than the size of the ‘bootp_t’ structure. A malicious guest could use this flaw to leak 10 bytes of uninitialized heap memory from the host. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3592)
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp6_input() function and could occur while processing a udp packet that is smaller than the size of the ‘udphdr’ structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3593)
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the udp_input() function and could occur while processing a udp packet that is smaller than the size of the ‘udphdr’ structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3594)
An invalid pointer initialization issue was found in the SLiRP networking implementation of QEMU. The flaw exists in the tftp_input() function and could occur while processing a udp packet that is smaller than the size of the ‘tftp_t’ structure. This issue may lead to out-of-bounds read access or indirect host memory disclosure to the guest. The highest threat from this vulnerability is to data confidentiality. This flaw affects libslirp versions prior to 4.6.0. (CVE-2021-3595)
Affected Packages:
qemu
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 to update your system.
New Packages:
aarch64:
qemu-3.1.0-8.amzn2.0.12.aarch64
qemu-common-3.1.0-8.amzn2.0.12.aarch64
qemu-guest-agent-3.1.0-8.amzn2.0.12.aarch64
qemu-img-3.1.0-8.amzn2.0.12.aarch64
ivshmem-tools-3.1.0-8.amzn2.0.12.aarch64
qemu-block-curl-3.1.0-8.amzn2.0.12.aarch64
qemu-block-dmg-3.1.0-8.amzn2.0.12.aarch64
qemu-block-iscsi-3.1.0-8.amzn2.0.12.aarch64
qemu-block-nfs-3.1.0-8.amzn2.0.12.aarch64
qemu-block-rbd-3.1.0-8.amzn2.0.12.aarch64
qemu-block-ssh-3.1.0-8.amzn2.0.12.aarch64
qemu-audio-alsa-3.1.0-8.amzn2.0.12.aarch64
qemu-audio-oss-3.1.0-8.amzn2.0.12.aarch64
qemu-audio-pa-3.1.0-8.amzn2.0.12.aarch64
qemu-audio-sdl-3.1.0-8.amzn2.0.12.aarch64
qemu-ui-curses-3.1.0-8.amzn2.0.12.aarch64
qemu-ui-gtk-3.1.0-8.amzn2.0.12.aarch64
qemu-ui-sdl-3.1.0-8.amzn2.0.12.aarch64
qemu-kvm-3.1.0-8.amzn2.0.12.aarch64
qemu-kvm-core-3.1.0-8.amzn2.0.12.aarch64
qemu-user-3.1.0-8.amzn2.0.12.aarch64
qemu-user-binfmt-3.1.0-8.amzn2.0.12.aarch64
qemu-user-static-3.1.0-8.amzn2.0.12.aarch64
qemu-system-aarch64-3.1.0-8.amzn2.0.12.aarch64
qemu-system-aarch64-core-3.1.0-8.amzn2.0.12.aarch64
qemu-system-x86-3.1.0-8.amzn2.0.12.aarch64
qemu-system-x86-core-3.1.0-8.amzn2.0.12.aarch64
qemu-debuginfo-3.1.0-8.amzn2.0.12.aarch64
i686:
qemu-3.1.0-8.amzn2.0.12.i686
qemu-common-3.1.0-8.amzn2.0.12.i686
qemu-guest-agent-3.1.0-8.amzn2.0.12.i686
qemu-img-3.1.0-8.amzn2.0.12.i686
ivshmem-tools-3.1.0-8.amzn2.0.12.i686
qemu-block-curl-3.1.0-8.amzn2.0.12.i686
qemu-block-dmg-3.1.0-8.amzn2.0.12.i686
qemu-block-iscsi-3.1.0-8.amzn2.0.12.i686
qemu-block-nfs-3.1.0-8.amzn2.0.12.i686
qemu-block-ssh-3.1.0-8.amzn2.0.12.i686
qemu-audio-alsa-3.1.0-8.amzn2.0.12.i686
qemu-audio-oss-3.1.0-8.amzn2.0.12.i686
qemu-audio-pa-3.1.0-8.amzn2.0.12.i686
qemu-audio-sdl-3.1.0-8.amzn2.0.12.i686
qemu-ui-curses-3.1.0-8.amzn2.0.12.i686
qemu-ui-gtk-3.1.0-8.amzn2.0.12.i686
qemu-ui-sdl-3.1.0-8.amzn2.0.12.i686
qemu-kvm-3.1.0-8.amzn2.0.12.i686
qemu-kvm-core-3.1.0-8.amzn2.0.12.i686
qemu-user-3.1.0-8.amzn2.0.12.i686
qemu-user-binfmt-3.1.0-8.amzn2.0.12.i686
qemu-user-static-3.1.0-8.amzn2.0.12.i686
qemu-system-aarch64-3.1.0-8.amzn2.0.12.i686
qemu-system-aarch64-core-3.1.0-8.amzn2.0.12.i686
qemu-system-x86-3.1.0-8.amzn2.0.12.i686
qemu-system-x86-core-3.1.0-8.amzn2.0.12.i686
qemu-debuginfo-3.1.0-8.amzn2.0.12.i686
src:
qemu-3.1.0-8.amzn2.0.12.src
x86_64:
qemu-3.1.0-8.amzn2.0.12.x86_64
qemu-common-3.1.0-8.amzn2.0.12.x86_64
qemu-guest-agent-3.1.0-8.amzn2.0.12.x86_64
qemu-img-3.1.0-8.amzn2.0.12.x86_64
ivshmem-tools-3.1.0-8.amzn2.0.12.x86_64
qemu-block-curl-3.1.0-8.amzn2.0.12.x86_64
qemu-block-dmg-3.1.0-8.amzn2.0.12.x86_64
qemu-block-iscsi-3.1.0-8.amzn2.0.12.x86_64
qemu-block-nfs-3.1.0-8.amzn2.0.12.x86_64
qemu-block-rbd-3.1.0-8.amzn2.0.12.x86_64
qemu-block-ssh-3.1.0-8.amzn2.0.12.x86_64
qemu-audio-alsa-3.1.0-8.amzn2.0.12.x86_64
qemu-audio-oss-3.1.0-8.amzn2.0.12.x86_64
qemu-audio-pa-3.1.0-8.amzn2.0.12.x86_64
qemu-audio-sdl-3.1.0-8.amzn2.0.12.x86_64
qemu-ui-curses-3.1.0-8.amzn2.0.12.x86_64
qemu-ui-gtk-3.1.0-8.amzn2.0.12.x86_64
qemu-ui-sdl-3.1.0-8.amzn2.0.12.x86_64
qemu-kvm-3.1.0-8.amzn2.0.12.x86_64
qemu-kvm-core-3.1.0-8.amzn2.0.12.x86_64
qemu-user-3.1.0-8.amzn2.0.12.x86_64
qemu-user-binfmt-3.1.0-8.amzn2.0.12.x86_64
qemu-user-static-3.1.0-8.amzn2.0.12.x86_64
qemu-system-aarch64-3.1.0-8.amzn2.0.12.x86_64
qemu-system-aarch64-core-3.1.0-8.amzn2.0.12.x86_64
qemu-system-x86-3.1.0-8.amzn2.0.12.x86_64
qemu-system-x86-core-3.1.0-8.amzn2.0.12.x86_64
qemu-debuginfo-3.1.0-8.amzn2.0.12.x86_64
Red Hat: CVE-2021-3592, CVE-2021-3593, CVE-2021-3594, CVE-2021-3595
Mitre: CVE-2021-3592, CVE-2021-3593, CVE-2021-3594, CVE-2021-3595
CVSS2
Attack Vector
LOCAL
Attack Complexity
LOW
Authentication
NONE
Confidentiality Impact
PARTIAL
Integrity Impact
NONE
Availability Impact
NONE
AV:L/AC:L/Au:N/C:P/I:N/A:N
CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality Impact
LOW
Integrity Impact
NONE
Availability Impact
NONE
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N
AI Score
Confidence
Low
EPSS
Percentile
17.2%