CVE-2017-12168 - Reachable Assertion

Severity

49%

Complexity

39%

Confidentiality

115%

The access_pmu_evcntr function in arch/arm64/kvm/sys_regs.c in the Linux kernel before 4.8.11 allows privileged KVM guest OS users to cause a denial of service (assertion failure and host OS crash) by accessing the Performance Monitors Cycle Count Register (PMCCNTR).

The access_pmu_evcntr function in arch/arm64/kvm/sys_regs.c in the Linux kernel before 4.8.11 allows privileged KVM guest OS users to cause a denial of service (assertion failure and host OS crash) by accessing the Performance Monitors Cycle Count Register (PMCCNTR).

CVSS 3.0 Base Score 6. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H).

CVSS 2.0 Base Score 4.9. CVSS Attack Vector: local. CVSS Attack Complexity: low. CVSS Vector: (AV:L/AC:L/Au:N/C:N/I:N/A:C).

Demo Examples

Reachable Assertion

CWE-617

In the excerpt below, an AssertionError (an unchecked exception) is thrown if the user hasn't entered an email address in an HTML form.


               
assert email != null;

Overview

First reported 7 years ago

2017-09-20 08:29:00

Last updated 5 years ago

2019-10-09 23:22:00

Affected Software

Linux Kernel

References

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9e3f7a29694049edd728e2400ab57ad7553e5aa9

Issue Tracking, Patch, Third Party Advisory

http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.11

Release Notes, Vendor Advisory

https://bugzilla.redhat.com/show_bug.cgi?id=1492984

Issue Tracking, Patch, Third Party Advisory

https://github.com/torvalds/linux/commit/9e3f7a29694049edd728e2400ab57ad7553e5aa9

Issue Tracking, Patch, Third Party Advisory

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