Vulnerability identifier: #VU9764

Vulnerability risk: Low

CVSSv3.1: 5.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2017-15115

CWE-ID: CWE-416

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 the sctp_do_peeloff function in net/sctp/socket.c in the Linux kernel does not check whether the intended netns is used in a peel-off action. A local attacker can make specially crafted system calls, trigger use-after-free error and cause the system to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Update to version 4.14.

Vulnerable software versions

Linux kernel: 4.13.1 - 4.13.16, 4.12.1 - 4.12.14, 4.11.1 - 4.11.12, 4.10.0 - 4.10.17

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External links
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=df80cd9b28b9ebaa284a41...

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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.