Vulnerabilities
Misconfiguration
Runtime Security
Compliance
CVE Vulnerabilities

CVE-2017-7471

Incorrect Permission Assignment for Critical Resource

Published: Jul 09, 2018 | Modified: Feb 12, 2023
CVSS 3.x
9
CRITICAL
Source:
NVD
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
CVSS 2.x
7.7 HIGH
AV:A/AC:L/Au:S/C:C/I:C/A:C
RedHat/V2
6.5 IMPORTANT
AV:A/AC:H/Au:S/C:C/I:C/A:C
RedHat/V3
7.6 IMPORTANT
CVSS:3.0/AV:A/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Ubuntu
HIGH
Additional information
NVDhttps://nvd.nist.gov/vuln/detail/CVE-2017-7471
CWEhttps://cwe.mitre.org/data/definitions/732.html

Quick Emulator (Qemu) built with the VirtFS, host directory sharing via Plan 9 File System (9pfs) support, is vulnerable to an improper access control issue. It could occur while accessing files on a shared host directory. A privileged user inside guest could use this flaw to access host file system beyond the shared folder and potentially escalating their privileges on a host.

Weakness

The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Affected Software

Name Vendor Start Version End Version
Qemu Qemu * 2.8.1.1 (including)
Qemu Qemu 2.9.0-rc0 (including) 2.9.0-rc0 (including)
Qemu Qemu 2.9.0-rc1 (including) 2.9.0-rc1 (including)
Qemu Qemu 2.9.0-rc2 (including) 2.9.0-rc2 (including)
Qemu Qemu 2.9.0-rc3 (including) 2.9.0-rc3 (including)
Qemu Qemu 2.9.0-rc4 (including) 2.9.0-rc4 (including)

Potential Mitigations

  • Run the code in a “jail” or similar sandbox environment that enforces strict boundaries between the process and the operating system. This may effectively restrict which files can be accessed in a particular directory or which commands can be executed by the software.
  • OS-level examples include the Unix chroot jail, AppArmor, and SELinux. In general, managed code may provide some protection. For example, java.io.FilePermission in the Java SecurityManager allows the software to specify restrictions on file operations.
  • This may not be a feasible solution, and it only limits the impact to the operating system; the rest of the application may still be subject to compromise.
  • Be careful to avoid CWE-243 and other weaknesses related to jails.

References

Aqua Security is the largest pure-play cloud native security company, providing customers the freedom to innovate and run their businesses with minimal friction. The Aqua Cloud Native Security Platform provides prevention, detection, and response automation across the entire application lifecycle to secure the build, secure cloud infrastructure and secure running workloads wherever they are deployed.
Copyright © 2024 Aqua Security Software Ltd.   Privacy Policy | Terms of Use