VDB
CVE-2020-25599
CVE-2020-25599
PUBLISHED
An issue was discovered in Xen through 4.14.x. There are evtchn_reset() race conditions. Uses of EVTCHNOP_reset (potentially by a guest on itself) or XEN_DOMCTL_soft_reset (by itself covered by XSA-77) can lead to the violation of various internal assumptions. This may lead to out of bounds memory accesses or triggering of bug checks. In particular, x86 PV guests may be able to elevate their privilege to that of the host. Host and guest crashes are also possible, leading to a Denial of Service (DoS). Information leaks cannot be ruled out. All Xen versions from 4.5 onwards are vulnerable. Xen versions 4.4 and earlier are not vulnerable.
EPSS 0.07% · 22.5th percentile
Risk Scores
EPSS Score
0.07%
22.5th percentile
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ubuntu:20.04:LTS | xen | 4.9.2-0ubuntu2, 4.11.3+24-g14b62ab3e5-1ubuntu2, 4.11.3+24-g14b62ab3e5-1ubuntu2.2 |
| Ubuntu:18.04:LTS | xen | 4.9.0-0ubuntu3, 4.9.0-0ubuntu4, 4.9.2-0ubuntu1 |
| Ubuntu:16.04:LTS | xen | 4.6.5-0ubuntu1, 4.5.1-0ubuntu1, 4.6.5-0ubuntu1.2 |
Exploit Intelligence
- https://xenbits.xen.org/xsa/advisory-343.html (circl)
- FEDORA-2020-306b84fd07 (circl)
- FEDORA-2020-f668e579be (circl)
- DSA-4769 (circl)
- openSUSE-SU-2020:1608 (circl)
- FEDORA-2020-d46fe34349 (circl)
- GLSA-202011-06 (circl)
- [oss-security] 20201216 Xen Security Advisory 343 v5 (CVE-2020-25599) - races with evtchn_reset() (circl)
Timeline
- Sep 22, 2020 CVE Published
- Apr 14, 2021 EPSS Score
- Jun 23, 2021 EPSS Score
- Aug 24, 2021 EPSS Score
- Oct 26, 2021 EPSS Score
- Jan 6, 2022 EPSS Score
- Feb 4, 2022 EPSS Score
- Feb 28, 2022 EPSS Score
- Apr 1, 2022 EPSS Score
- May 1, 2022 EPSS Score
- Jul 3, 2022 EPSS Score
- Sep 4, 2022 EPSS Score
References
- https://ubuntu.com/security/CVE-2020-25599 third-party-advisory
- https://xenbits.xen.org/xsa/advisory-343.html third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4JRXMKEMQRQYWYEPHVBIWUEAVQ3LU4FN/ third-party-advisory
- https://ubuntu.com/security/notices/USN-5617-1 vendor-advisory
- https://www.cve.org/CVERecord?id=CVE-2020-25599 third-party-advisory