CentOS 6 update for kernel

1) Infinite loop

EUVDB-ID: #VU6651

Risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2017-6214

CWE-ID: CWE-835 - Loop with Unreachable Exit Condition ('Infinite Loop')

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform denial of service (DoS) attack.

The vulnerability exists due to an error in tcp_splice_read() function in net/ipv4/tcp.c in Linux kernel before 4.9.11. A remote attacker can send a specially crafted TCP packet with the URG flag and trigger infinite loop.

Successful exploitation of the vulnerability may allow an attacker to perform denial of service (DoS) attack.

Mitigation

Update the affected package to version kernel-2.6.32-696.3.1.el6.

Vulnerable software versions

Linux kernel: 4.9.1 - 4.9.10

CPE2.3

• cpe:2.3:o:linux_foundation:linux_kernel:4.9.1:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.2:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.3:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.4:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.5:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.6:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.7:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.8:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.9:*:*:*:*:*:*:*
• cpe:2.3:o:linux_foundation:linux_kernel:4.9.10:*:*:*:*:*:*:*

External links

https://lists.centos.org/pipermail/centos-announce/2017-May/022448.html

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.