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Integer Overflow or Wraparound Affecting qemu package, versions <1:3.1+dfsg-1

low

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    Exploit Maturity Mature
    EPSS 14.12% (96th percentile)
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NVD
7.5 high
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SUSE
6.2 medium
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Red Hat
3.8 low

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  • Snyk ID SNYK-DEBIANUNSTABLE-QEMU-427567
  • published 21 Jun 2018
  • disclosed 21 Jun 2018
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Introduced: 21 Jun 2018

CVE-2018-12617 Open this link in a new tab
CWE-190 Open this link in a new tab

How to fix?

Upgrade Debian:unstable qemu to version 1:3.1+dfsg-1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu package and not the qemu package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

qmp_guest_file_read in qga/commands-posix.c and qga/commands-win32.c in qemu-ga (aka QEMU Guest Agent) in QEMU 2.12.50 has an integer overflow causing a g_malloc0() call to trigger a segmentation fault when trying to allocate a large memory chunk. The vulnerability can be exploited by sending a crafted QMP command (including guest-file-read with a large count value) to the agent via the listening socket.