1) Man-in-the-middle attack

EUVDB-ID: #VU357

Risk: Low

CVSSv3.1:

CVE-ID: CVE-2016-5696

CWE-ID: CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')

Exploit availability: Yes

Description

The vulnerability allows a remote attacker to write arbitrary files and cause DoS condition on the target system.

The weakness exists due to an error in net/ipv4/tcp_input.c while determining the rate of challenge ACK segments. A remote attacker can perform man-in-the-middle attack and hijack TCP sessions via a blind in-window attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Red Hat Enterprise Linux for Power, big endian - Extended Update Support: 6.7

Red Hat Enterprise Linux for IBM z Systems - Extended Update Support: 6.7

Red Hat Enterprise Linux Server - Extended Update Support: 6.7

kernel (Red Hat package): 2.6.32-71.7.1.el6 - 2.6.32-573.32.1.el6

Red Hat Enterprise Linux EUS Compute Node: 6.7

:

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CPE2.3

• cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power\,_big_endian_-_extended_update_support:6.7:*:*:*:*:red_hat_enterprise_linux:*:*

External links

http://access.redhat.com/errata/RHSA-2016:1815

Q & A

Can this vulnerability be exploited remotely?

Is there known malware, which exploits this vulnerability?