CVE-2020-11741: High severity XEN Xen vulnerability
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.
Affected Software
Remediation
Patch Available
Patch Available
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Event History
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2020-11741.
What is the title of the vulnerability?
The title of the vulnerability is '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.'
What is the affected software?
The affected software is Xen through version 4.13.x.
How can a guest OS user exploit this vulnerability?
A guest OS user can exploit this vulnerability if they have active profiling enabled, which allows them to obtain sensitive information about other guests, cause a denial of service, or possibly gain privileges.
Is there a remediation available for this vulnerability?
Yes, there are remediation options available. For Ubuntu, the version 4.11.3+24- (up to, but excluding 4.11.3+24-) provides a fix. For Debian, the versions 4.11.4+107-gef32c7afa2-1, 4.14.5+94-ge49571868d-1, 4.17.1+2-gb773c48e36-1, and 4.17.2-1 have a fix.