Low: qemu

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  

Additional References

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