Information disclosure in Xen - CVE-2020-11740

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Main Vulnerability Database Vulnerabilities #VU31974

Information disclosure in Xen - CVE-2020-11740

Published: July 28, 2020


Vulnerability identifier: #VU31974
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2020-11740
CWE-ID: CWE-200
Exploitation vector: Adjecent network
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to gain access to potentially sensitive information.

An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (without active profiling) to obtain sensitive information about other guests. Unprivileged guests can request to map xenoprof buffers, even if profiling has not been enabled for those guests.


Affected software

Xen
Gentoo Linux
Debian Linux
Opensuse
Ubuntu
Fedora
xen (Alpine package)
xen
libxengnttab1 (Ubuntu package)
xen-hypervisor-4.11-amd64 (Ubuntu package)
xen-hypervisor-4.11-armhf (Ubuntu package)
libxenmisc4.11 (Ubuntu package)
libxendevicemodel1 (Ubuntu package)
xenstore-utils (Ubuntu package)
xen-utils-4.11 (Ubuntu package)
xen-hypervisor-4.11-arm64 (Ubuntu package)
xen-utils-common (Ubuntu package)
libxenevtchn1 (Ubuntu package)
xen (Debian package)

How to mitigate CVE-2020-11740

Install updates from vendor's website.

xen (Alpine package) - update to 4.10.4-r3
xen - addressed in versions 4.11.3-4.fc30, 4.11.4-1.fc30, 4.12.2-3.fc31, 4.13.0-7.fc32
libxengnttab1 (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
xen-hypervisor-4.11-amd64 (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
xen-hypervisor-4.11-armhf (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
libxenmisc4.11 (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
libxendevicemodel1 (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
xenstore-utils (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
xen-utils-4.11 (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
xen-hypervisor-4.11-arm64 (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
xen-utils-common (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
libxenevtchn1 (Ubuntu package) - update to 4.11.3+24-g14b62ab3e5-1ubuntu2.3
xen (Debian package) - update to 4.11.4+24-gddaaccbbab-1~deb10u1

External References

Related Security Bulletins