Denial of service in Linux Kernel

1) Buffer overflow

EUVDB-ID: #VU8489

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 - Buffer overflow

Exploit availability: No

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 - 4.12.13

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.0.9:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.12.13:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.2.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.3.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.4.88:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.5.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.6.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.7.10:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.8.17:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.50:*:*:*:*:*:*:*

External links

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

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.