Memory leak in QEMU - CVE-2019-20382

Vulnerability identifier: #VU27388

CSH Severity: Medium

CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2019-20382

CWE-ID: CWE-401

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to memory leak within the zrle_compress_data() function in ui/vnc-enc-zrle.c during a VNC disconnect operation because libz is misused, resulting in a situation where memory allocated in deflateInit2 is not freed in deflateEnd. A remote attacker can perform a denial of service attack.

QEMU
Red Hat Virtualization Manager
Arch Linux
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Scientific Computing
Red Hat Enterprise Linux Workstation
Red Hat Enterprise Linux for Power, big endian
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux Server
Red Hat Enterprise Linux Desktop
Red Hat Enterprise Linux for x86_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
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux Server - TUS
Ubuntu
Opensuse
qemu-kvm (Red Hat package)
qemu (Ubuntu package)
qemu-kvm-rhev (Red Hat package)
qemu-kvm-ma (Red Hat package)
qemu (Debian package)
qemu-system-aarch64 (Ubuntu package)
qemu-system-mips (Ubuntu package)
qemu-system-arm (Ubuntu package)
qemu-system-misc (Ubuntu package)
qemu-system-ppc (Ubuntu package)
qemu-system-s390x (Ubuntu package)
qemu-system-sparc (Ubuntu package)
qemu-system (Ubuntu package)
qemu-system-x86 (Ubuntu package)
qemu-system-common (Ubuntu package)
qemu-system-x86-xen (Ubuntu package)
qemu-system-x86-microvm (Ubuntu package)
qemu-system-xen (Ubuntu package)
Red Hat OpenStack
Red Hat OpenStack for IBM Power

Install update from vendor's website.

QEMU - update to 4.1.1
qemu-kvm (Red Hat package) - update to 1.5.3-175.el7
qemu (Ubuntu package) - addressed in versions Ubuntu Pro (Infra-only), 1:2.5+dfsg-5ubuntu10.44, 1:2.11+dfsg-1ubuntu7.26, 1:4.0+dfsg-0ubuntu9.6, 1:4.2-3ubuntu6.1, 1:4.2-3ubuntu6.30, 1:6.2+dfsg-2ubuntu6.24
qemu-kvm-rhev (Red Hat package) - addressed in versions 2.12.0-48.el7, 2.12.0-48.el7_9.1
qemu-kvm-ma (Red Hat package) - update to 2.12.0-48.el7
qemu (Debian package) - update to 1:3.1+dfsg-8+deb10u5
qemu-system-aarch64 (Ubuntu package) - update to Ubuntu Pro (Infra-only)
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-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-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-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-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-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 (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-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-common (Ubuntu package) - update to Ubuntu Pro
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
qemu-system-xen (Ubuntu package) - addressed in versions 1:8.2.2+ds-0ubuntu1.4, 1:9.0.2+ds-4ubuntu5.1

• http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00007.html
• http://www.openwall.com/lists/oss-security/2020/03/05/1
• https://git.qemu.org/?p=qemu.git;a=commit;h=6bf21f3d83e95bcc4ba35a7a07cc6655e8b010b0

• Multiple vulnerabilities in QEMU
• OpenSUSE Linux update for qemu
• Debian update for qemu
• Arch Linux update for qemu
• Ubuntu update for QEMU
• Red Hat Enterprise Linux 8 update for the virt:rhel module
• Red Hat Virtualization 4 update for qemu-kvm-rhev
• Red Hat Enterprise Linux 7 update for qemu-kvm-ma
• Red Hat Enterprise Linux 7 update for qemu-kvm
• Red Hat OpenStack update for qemu-kvm-rhev
• Ubuntu update for qemu