Release of invalid pointer or reference in libslirp - CVE-2021-3592

Vulnerability identifier: #VU54308

CSH Severity: Low

CVSS v4: 5.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-3592

CWE-ID: CWE-763

Exploitation vector: Local access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to gain access to sensitive information.

The vulnerability exists due to invalid pointer initialization within the bootp_input() function while processing UDP packets in the SLiRP networking implementation of QEMU. A malicious guest could use this flaw to leak 10 bytes of uninitialized heap memory from the host.

libslirp
Gentoo Linux
Arch Linux
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
Red Hat CodeReady Linux Builder for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for ARM 64
HPE Helion Openstack
SUSE OpenStack Cloud
SUSE OpenStack Cloud Crowbar
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
Ubuntu
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Server for SAP Applications
SUSE Linux Enterprise Module for Server Applications
openSUSE Leap
openEuler
Fedora
qemu-system-common (Ubuntu package)
qemu-system-arm (Ubuntu package)
qemu-system-aarch64 (Ubuntu package)
qemu (Ubuntu package)
qemu-system-x86 (Ubuntu package)
qemu-system-sparc (Ubuntu package)
qemu-system-s390x (Ubuntu package)
qemu-system-ppc (Ubuntu package)
qemu-system-misc (Ubuntu package)
qemu-system-mips (Ubuntu package)
qemu-system (Ubuntu package)
qemu-ipxe
qemu-seabios
qemu-vgabios
qemu-guest-agent-debuginfo
qemu
qemu-guest-agent
qemu-block-curl
qemu-block-curl-debuginfo
qemu-block-rbd-debuginfo
qemu-block-ssh
qemu-block-ssh-debuginfo
qemu-debugsource
qemu-x86-debuginfo
qemu-x86
qemu-block-rbd
qemu-kvm
qemu-lang
qemu-tools-debuginfo
qemu-tools
qemu-block-iscsi-debuginfo
qemu-block-iscsi
qemu-s390-debuginfo
qemu-s390
qemu-arm-debuginfo
qemu-arm
qemu-ppc-debuginfo
qemu-ppc
qemu-debuginfo
libslirp0 (Ubuntu package)
qemu-help
qemu-img
qemu-system-x86-xen (Ubuntu package)
qemu-system-x86-microvm (Ubuntu package)
libslirp
libslirp-devel
libslirp-debugsource
libslirp0
libslirp0-debuginfo
qemu-system-xen (Ubuntu package)
qemu-sgabios

Install updates from vendor's website.

libslirp - update to 4.6.0
qemu-system-common (Ubuntu package) - update to Ubuntu Pro
qemu-system-arm (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24, 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-system-aarch64 (Ubuntu package) - update to Ubuntu Pro (Infra-only)
qemu (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24
qemu-system-x86 (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24, 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-system-sparc (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24, 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-system-s390x (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24, 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-system-ppc (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24, 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-system-misc (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24, 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-system-mips (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24, 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-system (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24, 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-ipxe - addressed in versions 1.0.0+-5.35.1, 1.0.0+-6.53.1, 1.0.0+-9.49.1, 1.0.0-41.68.1
qemu-seabios - addressed in versions 1.9.1_0_gb3ef39f-41.68.1, 1.10.2_0_g5f4c7b1-6.53.1, 1.11.0_0_g63451fc-5.35.1, 1.11.0_0_g63451fc-9.49.1
qemu-vgabios - addressed in versions 1.9.1_0_gb3ef39f-41.68.1, 1.10.2_0_g5f4c7b1-6.53.1, 1.11.0_0_g63451fc-5.35.1, 1.11.0_0_g63451fc-9.49.1
qemu-guest-agent-debuginfo - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-guest-agent - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-block-curl - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-block-curl-debuginfo - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-block-rbd-debuginfo - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-block-ssh - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-block-ssh-debuginfo - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-debugsource - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-x86-debuginfo - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-9.49.1
qemu-x86 - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-block-rbd - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-kvm - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-lang - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-tools-debuginfo - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-tools - addressed in versions 2.6.2-41.68.1, 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-block-iscsi-debuginfo - addressed in versions 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-block-iscsi - addressed in versions 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-s390-debuginfo - addressed in versions 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-s390 - addressed in versions 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-arm-debuginfo - addressed in versions 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-arm - addressed in versions 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-ppc-debuginfo - addressed in versions 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-ppc - addressed in versions 2.9.1-6.53.1, 2.11.2-5.35.1, 2.11.2-9.49.1
qemu-debuginfo - update to 2.11.2-9.49.1
libslirp0 (Ubuntu package) - addressed in versions 4.1.0-2ubuntu2.2, 4.3.1-1ubuntu0.1, 4.4.0-1ubuntu0.1, 4.4.0-1ubuntu0.21.10.1
qemu-seabios - update to 4.1.0-58
qemu-help - update to 4.1.0-58
qemu-debugsource - update to 4.1.0-58
qemu-block-rbd - update to 4.1.0-58
qemu-block-ssh - update to 4.1.0-58
qemu-guest-agent - update to 4.1.0-58
qemu-block-iscsi - update to 4.1.0-58
qemu-img - update to 4.1.0-58
qemu-block-curl - update to 4.1.0-58
qemu-debuginfo - update to 4.1.0-58
qemu - update to 4.1.0-58
qemu-system-x86-xen (Ubuntu package) - addressed in versions 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24, 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-system-x86-microvm (Ubuntu package) - addressed in versions 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24
libslirp - addressed in versions 4.3.1-4.fc33, 4.3.1-5.fc33, 4.4.0-3.fc34, 4.4.0-4.fc34
libslirp-devel - addressed in versions 4.3.1-150300.2.7.1, 4.3.1-150300.3.3.1
libslirp-debugsource - addressed in versions 4.3.1-150300.2.7.1, 4.3.1-150300.3.3.1
libslirp0 - addressed in versions 4.3.1-150300.2.7.1, 4.3.1-150300.3.3.1
libslirp0-debuginfo - addressed in versions 4.3.1-150300.2.7.1, 4.3.1-150300.3.3.1
qemu-system-xen (Ubuntu package) - addressed in versions 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1
qemu-sgabios - addressed in versions 8-5.35.1, 8-6.53.1, 8-9.49.1, 8-41.68.1

• https://bugzilla.redhat.com/show_bug.cgi?id=1970484

• Multiple vulnerabilities in Freedesktop libslirp
• Arch Linux update for libslirp
• Gentoo update for libslirp
• Ubuntu update for libslirp
• Ubuntu update for libslirp
• SUSE update for qemu
• SUSE update for qemu
• SUSE update for qemu
• SUSE update for qemu
• SUSE update for libslirp
• SUSE update for libslirp
• openEuler update for qemu
• Ubuntu update for qemu
• Red Hat Enterprise Linux 8 update for the virt:rhel and virt-devel:rhel modules
• Fedora 34 update for libslirp
• Fedora 33 update for libslirp
• Fedora 34 update for libslirp
• Fedora 33 update for libslirp