#VU31974 Information disclosure in Xen - CVE-2020-11740
Vulnerability identifier: #VU31974
Vulnerability risk: Low
CVSSv4.0: 1.2 [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/E:U/U:Clear]
CVE-ID:
CWE-ID:
CWE-200
Exploitation vector: Local network
Exploit availability: No
Vulnerable software:
Xen
Server applications /
Virtualization software
Vendor: Xen Project
Description
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.
Mitigation
Install updates from vendor's website.
Vulnerable software versions
Xen: 3.2 - 4.13.0
External links
https://lists.opensuse.org/opensuse-security-announce/2020-05/msg00006.html
https://www.openwall.com/lists/oss-security/2020/04/14/1
https://xenbits.xen.org/xsa/advisory-313.html
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/
https://security.gentoo.org/glsa/202005-08
https://www.debian.org/security/2020/dsa-4723
https://xenbits.xen.org/xsa/advisory-313.html
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the local network (LAN).
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.
