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CVE-2018-16872

CVE-2018-16872

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 5.0 · Medium · EPSS 1.1% · Fix available

Published
Updated

Stack: system

Affected products and versions

  • qemu:

    Versions
    • n/a: Affected

    No fix published

  • qemu Debian:12

    Affected ranges
    • ECOSYSTEM: < 1:3.1+dfsg-2

    Update to 1:3.1+dfsg-2

  • qemu Debian:13

    Affected ranges
    • ECOSYSTEM: < 1:3.1+dfsg-2

    Update to 1:3.1+dfsg-2

  • qemu Debian:14

    Affected ranges
    • ECOSYSTEM: < 1:3.1+dfsg-2

    Update to 1:3.1+dfsg-2

  • qemu Ubuntu:18.04:LTS

    Versions
    • 1:2.10+dfsg-0ubuntu3
    • 1:2.10+dfsg-0ubuntu4
    • 1:2.10+dfsg-0ubuntu5
    • 1:2.11+dfsg-1ubuntu1
    • 1:2.11+dfsg-1ubuntu2
    • 1:2.11+dfsg-1ubuntu4
    • 1:2.11+dfsg-1ubuntu5
    • 1:2.11+dfsg-1ubuntu6
    • 1:2.11+dfsg-1ubuntu7
    • 1:2.11+dfsg-1ubuntu7.1
    • 1:2.11+dfsg-1ubuntu7.2
    • 1:2.11+dfsg-1ubuntu7.3
    • 1:2.11+dfsg-1ubuntu7.4
    • 1:2.11+dfsg-1ubuntu7.5
    • 1:2.11+dfsg-1ubuntu7.6
    • 1:2.11+dfsg-1ubuntu7.7
    • 1:2.11+dfsg-1ubuntu7.8
    • 1:2.11+dfsg-1ubuntu7.9
    • 1:2.11+dfsg-1ubuntu7.10
    Affected ranges
    • ECOSYSTEM: < 1:2.11+dfsg-1ubuntu7.12

    Update to 1:2.11+dfsg-1ubuntu7.12

Original sources

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