Vulnerability identifier: #VU7255

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-2017-7487

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 use-after-free error the ipxitf_ioctl function in net/ipx/af_ipx.c. A local attacker can use a failed SIOCGIFADDR ioctl call for an IPX interface to trigger memory corruption and cause the system to crash.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Update to version 4.11.2.

Vulnerable software versions

Linux kernel: 4.1 - 4.1.42, 4.9 - 4.9.35, 4.4.0 - 4.4.75, 4.10.0 - 4.10.17, 4.11.1, 4.8.0 - 4.8.17, 4.7.0 - 4.7.10, 4.5.0 - 4.5.7, 4.6 rc1 - 4.6.7, 4.3 - 4.3.6, 4.2.0 - 4.2.8, 4.0.1 - 4.0.9

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External links
http://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ee0d8d8482345ff97a75a7...

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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.