Bug 1953022 (CVE-2021-3543)
Summary: | CVE-2021-3543 kernel: nitro_enclaves stale file descriptors on failed usercopy | ||
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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 ERRATA | QA Contact: | |
Severity: | medium | Docs Contact: | |
Priority: | medium | ||
Version: | unspecified | CC: | acaringi, adscvr, airlied, alciregi, bdettelb, bhu, blc, bmasney, brdeoliv, bskeggs, carnil, chwhite, crwood, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, jarodwilson, jeremy, jforbes, jglisse, jlelli, jonathan, josef, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mlangsdo, nmurray, ptalbert, qzhao, rvrbovsk, security-response-team, steved, tomckay, walters, wcosta, williams |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | kernel 4.18.0 | Doc Type: | If docs needed, set a value |
Doc Text: |
A flaw null pointer dereference in the Nitro Enclaves kernel driver was found in the way that Enclaves VMs forces closures on the enclave file descriptor. A local user of a host machine could use this flaw to crash the system or escalate their privileges on the system.
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2021-06-01 11:32:11 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: | 1953717, 1953718, 1953719, 1955580, 1956379, 1956380 | ||
Bug Blocks: | 1952029, 1958957 |
Description
Guilherme de Almeida Suckevicz
2021-04-23 18:21:24 UTC
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1955580] External References: https://lore.kernel.org/lkml/20210429165941.27020-2-andraprs@amazon.com/ Statement: This flaw is rated as having a Moderate impact because in the default configuration, the issue can only be triggered by a privileged local user (with access to the ne group if this user manages Enclaves VMs). This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:2169 https://access.redhat.com/errata/RHSA-2021:2169 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:2168 https://access.redhat.com/errata/RHSA-2021:2168 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-2021-3543 |