Bug 1862849 (CVE-2020-14351)
| Summary: | CVE-2020-14351 kernel: performance counters race condition use-after-free | ||
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| Product: | [Other] Security Response | Reporter: | Wade Mealing <wmealing> |
| 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, acme, airlied, bhu, blc, bmasney, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, jolsa, jonathan, josef, jross, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, mpetlan, nmurray, ptalbert, qzhao, rt-maint, rvrbovsk, security-response-team, steved, walters, williams |
| Target Milestone: | --- | Keywords: | Security |
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | kernel 5.8.17 | Doc Type: | If docs needed, set a value |
| Doc Text: |
A flaw was found in the Linux kernel. A use-after-free memory flaw was found in the perf subsystem allowing a local attacker with permission to monitor perf events to corrupt memory and possibly escalate privileges. 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: | 2021-02-16 19:01:57 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: | 1865720, 1865721, 1865722, 1865723, 1865724, 1865725, 1869921, 1869922, 1869924, 1869925, 1869926, 1869927, 1869928, 1869929, 1869930, 1869931, 1869932, 1869933, 1869934, 1869935, 1869936, 1869937, 1869938, 1869939, 1869940, 1869941, 1896213, 1897016, 1897017 | ||
| Bug Blocks: | 1859675, 1954955 | ||
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Description
Wade Mealing
2020-08-03 03:06:29 UTC
Statement: The Red Hat Enterprise Linux 7.2 and later kernels default to a safe /proc/sys/kernel/perf_event_paranoid setting; local administrators may have reason to change the setting to allow non privileged users to monitor performance statistics. Mitigation: While there is no way to disable the perf subsystem on Linux systems, reducing or removing users access to the perf events can effectively mitigate this flaw. Upstream kernel documentation has been written regarding this mechanism: https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html. Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1896213] This was fixed for Fedora with the 5.8.17 stable kernel updates. Acknowledgments: Name: Ryota Shiga (Flatt Security), Zero Day Initiative This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:0537 https://access.redhat.com/errata/RHSA-2021:0537 This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2021:0558 https://access.redhat.com/errata/RHSA-2021:0558 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-2020-14351 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.1 Extended Update Support Via RHSA-2021:0686 https://access.redhat.com/errata/RHSA-2021:0686 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:0774 https://access.redhat.com/errata/RHSA-2021:0774 This issue has been addressed in the following products: Red Hat Enterprise Linux 8.2 Extended Update Support Via RHSA-2021:0765 https://access.redhat.com/errata/RHSA-2021:0765 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.3 Advanced Update Support Via RHSA-2021:0848 https://access.redhat.com/errata/RHSA-2021:0848 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:0856 https://access.redhat.com/errata/RHSA-2021:0856 This issue has been addressed in the following products: Red Hat Enterprise Linux 7 Via RHSA-2021:0857 https://access.redhat.com/errata/RHSA-2021:0857 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.6 Extended Update Support Via RHSA-2021:0878 https://access.redhat.com/errata/RHSA-2021:0878 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.7 Extended Update Support Via RHSA-2021:1028 https://access.redhat.com/errata/RHSA-2021:1028 This issue has been addressed in the following products: Red Hat Enterprise Linux 7.4 Advanced Update Support Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions Red Hat Enterprise Linux 7.4 Telco Extended Update Support Via RHSA-2021:1267 https://access.redhat.com/errata/RHSA-2021:1267 |