Host Privilege Escalation Vulnerability in QEMU's Virtio-FS Shared File System Daemon
CVE-2020-35517

8.2HIGH

Key Information:

Vendor

Qemu
Status
Qemu
Vendor
CVE Published:
28 January 2021

What is CVE-2020-35517?

A significant vulnerability exists in QEMU's virtio-fs shared file system daemon, where a privileged guest user can create device special files within a shared directory. This flaw may allow the guest user to gain read and write access to host devices, potentially compromising the host system's security and stability. Addressing this issue is critical to maintaining the integrity and security of virtualized environments.

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Affected Version(s)

qemu qemu 5.2.0

References

https://github.com/qemu/qemu/commit/ebf101955ce8f8d72fba1...
x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=1915823
x_refsource_MISC
https://www.openwall.com/lists/oss-security/2021/01/22/1
x_refsource_MISC

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
High
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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