Vulnerability in Xen
CVE-2020-11741
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (34.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 34.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Xen — versions 4.13.0
- Debian Linux — versions 10.0
- Fedoraproject Fedora — versions 30, 31, 32
- openSUSE Leap — versions 15.1
Weakness classification (CWE)
References
- xenbits.xen.org/xsa/advisory-313.html (Patch, Vendor Advisory)
- xenbits.xen.org/xsa/advisory-313.html (Patch, Vendor Advisory)
- www.openwall.com/lists/oss-security/2020/04/14/1 (mailing-list, Patch, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- lists.opensuse.org/opensuse-security-announce/2020-05/msg00006.html (vendor-advisory, Mailing List, Third Party Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- security.gentoo.org/glsa/202005-08 (vendor-advisory, Third Party Advisory)
- www.debian.org/security/2020/dsa-4723 (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2020-11741?
- CVE-2020-11741 is a high-severity vulnerability in Xen, classified under CWE-909. CVSS score: 8.8/10. Published 2020-04-14.
- How severe is CVE-2020-11741?
- High severity. CVSS v3 base score is 8.8 out of 10.