CVE-2020-11741

high

Description

An issue was discovered in xenoprof in Xen through 4.13.x, allowing guest OS users (with active profiling) to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges. For guests for which "active" profiling was enabled by the administrator, the xenoprof code uses the standard Xen shared ring structure. Unfortunately, this code did not treat the guest as a potential adversary: it trusts the guest not to modify buffer size information or modify head / tail pointers in unexpected ways. This can crash the host (DoS). Privilege escalation cannot be ruled out.

References

https://xenbits.xen.org/xsa/advisory-313.html

http://xenbits.xen.org/xsa/advisory-313.html

http://www.openwall.com/lists/oss-security/2020/04/14/1

https://lists.fedoraproject.org/archives/list/[email protected]/message/YMAW7D2MP6RE4BFI5BZWOBBWGY3VSOFN/

https://lists.fedoraproject.org/archives/list/[email protected]/message/5M2XRNCHOGGTJQBZQJ7DCV6ZNAKN3LE2/

http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00006.html

https://lists.fedoraproject.org/archives/list/[email protected]/message/NVTP4OYHCTRU3ONFJOFJQVNDFB25KLLG/

https://security.gentoo.org/glsa/202005-08

https://www.debian.org/security/2020/dsa-4723

Details

Source: MITRE

Published: 2020-04-14

Updated: 2022-05-03

Type: CWE-909

Risk Information

CVSS v2

Base Score: 6.9

Vector: AV:L/AC:M/Au:N/C:C/I:C/A:C

Impact Score: 10

Exploitability Score: 3.4

Severity: MEDIUM

CVSS v3

Base Score: 8.8

Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Impact Score: 6

Exploitability Score: 2

Severity: HIGH