#VU11519 Integer overflow in Linux kernel - CVE-2017-18255

Vulnerability identifier: #VU11519

Vulnerability risk: Low

CVSSv4.0: 4.3 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-18255

CWE-ID: CWE-190

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Linux kernel
Operating systems & Components / Operating system

Vendor: Linux Foundation

Description
The vulnerability allows a local attacker to cause DoS condition on the target system.

The weakness exists due to improper validation of the input value from userspace when using the perf_cpu_time_max_percent_handler function, as defined in the kernel/events/core.c source code file. A local attacker can send specially crafted input that contains large values, trigger integer overflow and cause the service to crash.

Mitigation
Update to version 4.11 or later.

Vulnerable software versions

Linux kernel: 4.0.1 - 4.0.6, 4.1 - 4.10.15, 4.2 - 4.2.6, 4.3 - 4.3.6, 4.4.0 - 4.4.111, 4.5 - 4.5.4, 4.6 rc1 - 4.6.3, 4.7 - 4.7.9, 4.8 - 4.8.11, 4.9 - 4.9.76

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External links
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1572e45a924f254d957009...

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.