CVE-2018-12617

Advisory lineage Upstream: 0 Downstream: 17
Modified
Published: 21 Jun 2018, 18:00
Last modified:05 Aug 2024, 08:38

Vulnerability Summary

Overall Risk (default)
medium
42/100
CVSS Score
7.5 HIGH
v3.1 (nvd)
EPSS Score
11.74% MEDIUM
12% probability +0.75%
KEV
Not listed
Ransomware
No reports
Public exploits
2 found
Dark Web
Not detected

Timeline

21 Jun 2018, 18:00
Published
Vulnerability first disclosed
05 Aug 2024, 08:38
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
  • v2.0•MEDIUM•Score: 5AV:N/AC:L/Au:N/C:N/I:N/A:P

EPSS Trends

Current EPSS score: 11.74%• Percentile: 94%

Techniques & Countermeasures

  • CWE-190•Integer Overflow or Wraparound

    The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

Affected Systems

  • canonical•ubuntu_linux

    14.04 | 16.04 | 18.04 | 18.10

  • debian•debian_linux

    8.0 | 9.0

  • qemu•qemu

    ≤ 2.12.50

References (8)