#VU8489 Buffer overflow in Linux kernel - CVE-2017-14497

Vulnerability identifier: #VU8489

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-2017-14497

CWE-ID: CWE-120

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 buffer overflow in the tpacket_rcv() function in 'net/packet/af_packet.c'. A local attacker can perform specially crafted system calls to write up to 10 bytes to kernel memory outside of the allocated kernel buffer, corrupt memory or XFS disk contents and cause the system to crash.

Successful exploitation of the vulnerability result in denial of service.

Mitigation
Update to version 4.13.

Vulnerable software versions

Linux kernel: 4.0.1 - 4.0.9, 4.1.1 - 4.12.13, 4.2.0 - 4.2.8, 4.3.1 - 4.3.6, 4.4.0 - 4.4.88, 4.5.0 - 4.5.7, 4.6.0 - 4.6.7, 4.7.0 - 4.7.10, 4.8.0 - 4.8.17, 4.9 - 4.9.50

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External links
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=edbd58be15a957f6a760c4...

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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.