Vulnerability · Published Apr 14, 2020 · Assigned by mitre
CVE-2020-11741
High 8.8
In plain English
A high-severity security flaw in the xen package (Debian). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 37% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | xen | 4.11.4-1 | DEBIAN-CVE-2020-11741 |
| Debian:13 | xen | 4.11.4-1 | DEBIAN-CVE-2020-11741 |
| Debian:14 | xen | 4.11.4-1 | DEBIAN-CVE-2020-11741 |
Affected products (as reported)
References
- https://xenbits.xen.org/xsa/advisory-313.html x_refsource_MISC
- http://xenbits.xen.org/xsa/advisory-313.html x_refsource_CONFIRM
- [oss-security] 20200414 Xen Security Advisory 313 v3 (CVE-2020-11740,CVE-2020-11741) - multiple xenoprof issues mailing-list, x_refsource_MLIST
- FEDORA-2020-440457afe4 vendor-advisory, x_refsource_FEDORA
- FEDORA-2020-295ed0b1e0 vendor-advisory, x_refsource_FEDORA
- openSUSE-SU-2020:0599 vendor-advisory, x_refsource_SUSE
- FEDORA-2020-cbc3149753 vendor-advisory, x_refsource_FEDORA
- GLSA-202005-08 vendor-advisory, x_refsource_GENTOO
- DSA-4723 vendor-advisory, x_refsource_DEBIAN