Privilege escalation in QEMU



Published: 2021-01-26
Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2020-35517
CWE-ID CWE-264
Exploitation vector Local network
Public exploit N/A
Vulnerable software
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QEMU
Client/Desktop applications / Virtualization software

Vendor QEMU

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Security restrictions bypass

EUVDB-ID: #VU50041

Risk: Medium

CVSSv3.1:

CVE-ID: CVE-2020-35517

CWE-ID: CWE-264 - Permissions, Privileges, and Access Controls

Exploit availability: No

Description

The vulnerability allows a remote user to escalate privileges on the system.

The vulnerability exists within the virtio-fs shared file system daemon (virtiofsd). A remote privileged user of the guest operating system can create device special file in the shared directory and use it to r/w access host devices.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

QEMU: 5.0.0 - 5.2.0


CPE2.3 External links

http://seclists.org/oss-sec/2021/q1/64
http://lists.gnu.org/archive/html/qemu-devel/2021-01/msg05461.html

Q & A

Can this vulnerability be exploited remotely?

How the attacker can exploit this vulnerability?

Is there known malware, which exploits this vulnerability?



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