CVE-2020-11740: Medium severity XEN Xen vulnerability
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. These buffers were not scrubbed.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/xento a version that resolves this vulnerability.Fixed in 4.14.6-1Fixed in 4.14.5+94-ge49571868d-1Fixed in 4.17.5+23-ga4e5191dc0-1+deb12u1Fixed in 4.17.5+23-ga4e5191dc0-1Fixed in 4.20.0-1
Event History
Frequently Asked Questions
What is the vulnerability ID for this issue?
The vulnerability ID for this issue is CVE-2020-11740.
What is the title of this vulnerability?
The title of this vulnerability is '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.'
What is the impact of this vulnerability?
This vulnerability allows unprivileged guest OS users to obtain sensitive information about other guests.
Which software versions are affected by this vulnerability?
The affected software versions include Xen 4.11.3+24- (Ubuntu) and Xen 4.11.4+107-gef32c7afa2-1, 4.14.5+94-ge49571868d-1, 4.17.1+2-gb773c48e36-1, and 4.17.2-1 (Debian).
Are there any remediation steps available for this vulnerability?
Yes, the recommended remedy is to update to the specified versions of Xen for Ubuntu (4.11.3+24-) and Debian (4.11.4+107-gef32c7afa2-1, 4.14.5+94-ge49571868d-1, 4.17.1+2-gb773c48e36-1, or 4.17.2-1).