CVE-2018-16872

medium
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Description

A flaw was found in qemu Media Transfer Protocol (MTP). The code opening files in usb_mtp_get_object and usb_mtp_get_partial_object and directories in usb_mtp_object_readdir doesn't consider that the underlying filesystem may have changed since the time lstat(2) was called in usb_mtp_object_alloc, a classical TOCTTOU problem. An attacker with write access to the host filesystem shared with a guest can use this property to navigate the host filesystem in the context of the QEMU process and read any file the QEMU process has access to. Access to the filesystem may be local or via a network share protocol such as CIFS.

References

http://lists.opensuse.org/opensuse-security-announce/2019-03/msg00042.html

http://www.securityfocus.com/bid/106212

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-16872

https://lists.debian.org/debian-lts-announce/2019/02/msg00041.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/CGCFIFSIWUREEQQOZDZFBYKWZHXCWBZN/

https://lists.fedoraproject.org/archives/list/[email protected]/message/KJMTVGDLA654HNCDGLCUEIP36SNJEKK7/

https://seclists.org/bugtraq/2019/May/76

https://usn.ubuntu.com/3923-1/

https://www.debian.org/security/2019/dsa-4454

Details

Source: MITRE

Published: 2018-12-13

Updated: 2020-12-04

Type: CWE-367

Risk Information

CVSS v2

Base Score: 3.5

Vector: AV:N/AC:M/Au:S/C:P/I:N/A:N

Impact Score: 2.9

Exploitability Score: 6.8

Severity: LOW

CVSS v3

Base Score: 5.3

Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N

Impact Score: 3.6

Exploitability Score: 1.6

Severity: MEDIUM

Tenable Plugins

View all (16 total)

IDNameProductFamilySeverity
138009EulerOS Virtualization 3.0.6.0 : qemu-kvm (EulerOS-SA-2020-1790)NessusHuawei Local Security Checks
critical
134555EulerOS Virtualization for ARM 64 3.0.2.0 : qemu-kvm (EulerOS-SA-2020-1266)NessusHuawei Local Security Checks
high
131517EulerOS Virtualization for ARM 64 3.0.3.0 : qemu-kvm (EulerOS-SA-2019-2352)NessusHuawei Local Security Checks
high
128184EulerOS 2.0 SP8 : qemu-kvm (EulerOS-SA-2019-1815)NessusHuawei Local Security Checks
high
125609Debian DSA-4454-1 : qemu - security updateNessusDebian Local Security Checks
high
124467Fedora 30 : 2:qemu (2019-0664c7724d)NessusFedora Local Security Checks
high
123493openSUSE Security Update : qemu (openSUSE-2019-1074)NessusSuSE Local Security Checks
high
123457Ubuntu 14.04 LTS / 16.04 LTS / 18.04 LTS / 18.10 : QEMU vulnerabilities (USN-3923-1)NessusUbuntu Local Security Checks
high
123101Fedora 29 : 2:qemu (2019-88a98ce795)NessusFedora Local Security Checks
high
122776SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2019:0582-1)NessusSuSE Local Security Checks
high
122511Debian DLA-1694-1 : qemu security updateNessusDebian Local Security Checks
high
122495openSUSE Security Update : qemu (openSUSE-2019-254)NessusSuSE Local Security Checks
high
122471SUSE SLES12 Security Update : qemu (SUSE-SU-2019:0489-1)NessusSuSE Local Security Checks
high
122419SUSE SLES12 Security Update : qemu (SUSE-SU-2019:0471-1)NessusSuSE Local Security Checks
high
122341SUSE SLED12 / SLES12 Security Update : qemu (SUSE-SU-2019:0435-1)NessusSuSE Local Security Checks
high
122309SUSE SLED15 / SLES15 Security Update : qemu (SUSE-SU-2019:0423-1)NessusSuSE Local Security Checks
high