#VU10793 Security restrictions bypass in libvirt - CVE-2018-6764

Vulnerability identifier: #VU10793

Vulnerability risk: Low

CVSSv4.0: 6.3 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2018-6764

CWE-ID: CWE-264

Exploitation vector: Local network

Exploit availability: No

Vulnerable software:
libvirt
Universal components / Libraries / Libraries used by multiple products

Vendor: libvirt.org

Description
The vulnerability allows an adjacent attacker to bypass security restrictions on the target system.

The weakness exists in the util/virlog.c source code file due to improper determination of hostnames during LXC container startup. An adjacent attacker can bypass security restrictions and execute arbitrary commands.

Mitigation
Update to version 4.0.0-2.

Vulnerable software versions

libvirt: 3.7.0 - 4.0.0

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External links
https://libvirt.org/git/?p=libvirt.git;a=commit;h=759b4d1b0fe5f4d84d98b99153dfa7ac289dd167

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the local network (LAN).

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.