Bug 1563069 (CVE-2017-18255)
Summary: | CVE-2017-18255 kernel: Integer overflow in events/core.c:perf_cpu_time_max_percent_handler() can allow for denial of service | ||
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Product: | [Other] Security Response | Reporter: | Sam Fowler <sfowler> |
Component: | vulnerability | Assignee: | Red Hat Product Security <security-response-team> |
Status: | CLOSED NOTABUG | QA Contact: | |
Severity: | low | Docs Contact: | |
Priority: | low | ||
Version: | unspecified | CC: | airlied, ajax, aquini, bhu, blc, bskeggs, dhoward, esammons, ewk, fhrbata, hdegoede, hkrzesin, hwkernel-mgr, iboverma, ichavero, itamar, jarodwilson, jforbes, jglisse, jkacur, john.j5live, jonathan, josef, jross, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, lwang, matt, mchehab, mcressma, mguzik, mjg59, mlangsdo, nmurray, plougher, rt-maint, rvrbovsk, skozina, slawomir, steved, vdronov, williams |
Target Milestone: | --- | Keywords: | Security |
Target Release: | --- | ||
Hardware: | All | ||
OS: | Linux | ||
Whiteboard: | |||
Fixed In Version: | kernel 4.11 | Doc Type: | If docs needed, set a value |
Doc Text: |
A vulnerability was found in the Linux kernel's kernel/events/core.c:perf_cpu_time_max_percent_handler() function. Local privileged users could exploit this flaw to cause a denial of service due to integer overflow or possibly have unspecified other impact.
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Story Points: | --- |
Clone Of: | Environment: | ||
Last Closed: | 2018-04-04 17:06:39 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: | |||
Bug Blocks: | 1563071 |
Description
Sam Fowler
2018-04-03 06:28:21 UTC
Notes: This flaw is exploitable by the privileged user (the real "root") only and not from namespaces: # ls -l /proc/sys/kernel/perf_cpu_time_max_percent -rw-r--r-- 1 root root 0 Apr 4 18:52 /proc/sys/kernel/perf_cpu_time_max_percent $ unshare -U -r # echo 30 > /proc/sys/kernel/perf_cpu_time_max_percent -bash: /proc/sys/kernel/perf_cpu_time_max_percent: Permission denied |