Release of invalid pointer or reference in libslirp - CVE-2021-3593

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Main Vulnerability Database Vulnerabilities #VU54309

Release of invalid pointer or reference in libslirp - CVE-2021-3593

Published: June 22, 2021


Vulnerability identifier: #VU54309
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-2021-3593
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 udp6_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 Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Storage
HPE Helion Openstack
Red Hat CodeReady Linux Builder for IBM z Systems
SUSE OpenStack Cloud Crowbar
SUSE OpenStack Cloud
Red Hat CodeReady Linux Builder for ARM 64
Red Hat CodeReady Linux Builder for Power, little endian
Red Hat CodeReady Linux Builder for x86_64
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
SUSE Linux Enterprise Server
SUSE Linux Enterprise Server for SAP
SUSE Linux Enterprise High Performance Computing
SUSE Linux Enterprise Module for Server Applications
SUSE Linux Enterprise Server for SAP Applications
openSUSE Leap
openEuler
Ubuntu
Fedora
qemu-ipxe
qemu-seabios
qemu-vgabios
qemu-x86-debuginfo
qemu-x86
qemu-tools-debuginfo
qemu-tools
qemu-lang
qemu-kvm
qemu-block-curl-debuginfo
qemu
qemu-block-curl
qemu-block-rbd
qemu-block-rbd-debuginfo
qemu-guest-agent-debuginfo
qemu-block-ssh
qemu-block-ssh-debuginfo
qemu-debugsource
qemu-guest-agent
qemu-block-iscsi
qemu-block-iscsi-debuginfo
qemu-s390-debuginfo
qemu-s390
qemu-arm-debuginfo
qemu-arm
qemu-ppc-debuginfo
qemu-ppc
qemu-debuginfo
libslirp0 (Ubuntu package)
qemu-img
qemu-help
libslirp
libslirp0-debuginfo
libslirp0
libslirp-devel
libslirp-debugsource
qemu-sgabios

How to mitigate CVE-2021-3593

Install updates from vendor's website.

libslirp - update to 4.6.0
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-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-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-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-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-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 - 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-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-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-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-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-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-iscsi - addressed in versions 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-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 - update to 4.1.0-58
qemu-guest-agent - update to 4.1.0-58
qemu-debuginfo - update to 4.1.0-58
qemu-block-curl - update to 4.1.0-58
qemu-img - update to 4.1.0-58
qemu-block-iscsi - update to 4.1.0-58
qemu-block-ssh - update to 4.1.0-58
qemu-block-rbd - update to 4.1.0-58
qemu-debugsource - update to 4.1.0-58
qemu-help - update to 4.1.0-58
qemu-seabios - update to 4.1.0-58
libslirp - addressed in versions 4.3.1-4.fc33, 4.3.1-5.fc33, 4.4.0-3.fc34, 4.4.0-4.fc34
libslirp0-debuginfo - update to 4.3.1-150300.11.1
libslirp0 - update to 4.3.1-150300.11.1
libslirp-devel - update to 4.3.1-150300.11.1
libslirp-debugsource - update to 4.3.1-150300.11.1
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