Bug 1879567 (CVE-2020-25599)
| Summary: | CVE-2020-25599 xen: races with evtchn_reset function (XSA-343) | ||
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| Product: | [Other] Security Response | Reporter: | Guilherme de Almeida Suckevicz <gsuckevi> |
| Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
| Status: | CLOSED NOTABUG | QA Contact: | |
| Severity: | high | Docs Contact: | |
| Priority: | high | ||
| Version: | unspecified | CC: | acaringi, ailan, bhu, bmasney, brdeoliv, dhoward, drjones, dvlasenk, fhrbata, hkrzesin, imammedo, jforbes, jshortt, jstancek, knoel, m.a.young, mrezanin, nmurray, pbonzini, ptalbert, robinlee.sysu, rvrbovsk, security-response-team, vkuznets, xen-maint |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | If docs needed, set a value | |
| Doc Text: |
A flaw was found in Xen. Uses of EVTCHNOP_reset or XEN_DOMCTL_soft_reset can lead to the violation of various internal assumptions leading to an out of bounds memory access or triggering of bug checks. In particular x86 PV guests may be able to elevate their privilege to that of the host. Information leaks cannot be ruled out and host and guest crashes are also possible, leading to a denial of service (DoS). The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
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Story Points: | --- |
| Clone Of: | Environment: | ||
| Last Closed: | 2020-09-22 20:41:30 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
| Bug Depends On: | 1881581 | ||
| Bug Blocks: | 1877386 | ||
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Description
Guilherme de Almeida Suckevicz
2020-09-16 14:24:39 UTC
Acknowledgments: Name: the Xen project Statement: All Xen versions from 4.4 onwards are vulnerable. Red Hat Enterprise Linux 5 is not affected by this flaw, as it shipped an older version of Xen. Mitigation: There is no known mitigation for this flaw apart from applying the patch. Created xen tracking bugs for this issue: Affects: fedora-all [bug 1881581] This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2020-25599 External References: https://xenbits.xen.org/xsa/advisory-343.html |