Release of invalid pointer or reference in libslirp - CVE-2021-3594

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Main Vulnerability Database Vulnerabilities #VU54310

Release of invalid pointer or reference in libslirp - CVE-2021-3594

Published: June 22, 2021


Vulnerability identifier: #VU54310
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-2021-3594
CWE-ID: CWE-763
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to invalid pointer initialization within the udp_input() function while processing UDP packets in the SLiRP networking implementation of QEMU. A malicious guest could use this vulnerability to read host memory.

Affected software

libslirp
Gentoo Linux
Arch Linux
SUSE Manager Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for IBM z Systems
Red Hat CodeReady Linux Builder for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat CodeReady Linux Builder for IBM z Systems
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
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-system-x86-microvm (Ubuntu package)
qemu-system-x86-xen (Ubuntu package)
libslirp
libslirp-devel
libslirp-debugsource
libslirp0
libslirp0-debuginfo
qemu-system-xen (Ubuntu package)
qemu-sgabios

How to mitigate CVE-2021-3594

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-system-x86-microvm (Ubuntu package) - addressed in versions 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24
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
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

External References

Related Security Bulletins