#VU7237 Security restrictions bypass in Linux kernel - CVE-2017-1000365

Vulnerability identifier: #VU7237

Vulnerability risk: Low

CVSSv4.0: 1.1 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-1000365, CVE-2017-7482

CWE-ID: CWE-264

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 bypass security restrictions on the target system.

The weakness exists due to the failure to take the argument and environment strings passed through RLIMIT_STACK/RLIM_INFINITY (1/4 of the size) into account when imposing a size restriction. A local attacker can bypass security limitation and perform unauthorized actions.

Successful exploitation of the vulnerability results in access to the system.

Mitigation
Update to version 4.11.6.

Vulnerable software versions

Linux kernel: 4.0.1 - 4.0.9, 4.1 - 4.11.5, 4.2.0 - 4.2.8, 4.3 - 4.3.6, 4.4.0 - 4.4.76, 4.5.0 - 4.5.7, 4.6 rc1 - 4.6.7, 4.7.0 - 4.7.10, 4.8.0 - 4.8.17, 4.9 - 4.9.36

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External links
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.35
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1be7107fbe18eed3e319a6...

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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.