Integer Overflow or Wraparound Affecting qemu package, versions <1:2.12+dfsg-3ubuntu9


Severity

Recommended
medium

Based on Ubuntu security rating.

Threat Intelligence

Exploit Maturity
Mature
EPSS
10.49% (96th percentile)

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  • Snyk IDSNYK-UBUNTU2004-QEMU-579242
  • published21 Jun 2018
  • disclosed21 Jun 2018

Introduced: 21 Jun 2018

CVE-2018-12617  (opens in a new tab)
CWE-190  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 qemu to version 1:2.12+dfsg-3ubuntu9 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 Ubuntu. See How to fix? for Ubuntu:20.04 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.

CVSS Scores

version 3.1