#VU39737 Buffer overflow in Linux kernel - CVE-2017-5547

Vulnerability identifier: #VU39737

Vulnerability risk: Low

CVSSv4.0: 5.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2017-5547

CWE-ID: CWE-119

Exploitation vector: Local

Exploit availability: No

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

Vendor: Linux Foundation

Description

The vulnerability allows a local authenticated user to execute arbitrary code.

drivers/hid/hid-corsair.c in the Linux kernel 4.9.x before 4.9.6 interacts incorrectly with the CONFIG_VMAP_STACK option, which allows local users to cause a denial of service (system crash or memory corruption) or possibly have unspecified other impact by leveraging use of more than one virtual page for a DMA scatterlist.

Mitigation
Install update from vendor's website.

Vulnerable software versions

Linux kernel: 4.9 - 4.9.5

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External links
https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=6d104af38b570d37aa32a5803b04c354f8ed513d
https://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.9.6
https://www.openwall.com/lists/oss-security/2017/01/21/3
https://www.securityfocus.com/bid/95709
https://bugzilla.redhat.com/show_bug.cgi?id=1416096
https://github.com/torvalds/linux/commit/6d104af38b570d37aa32a5803b04c354f8ed513d

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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.