Red Hat update for kernel
| Risk | Low |
| Patch available | YES |
| Number of vulnerabilities | 1 |
| CVE-ID | CVE-2016-5696 |
| CWE-ID | CWE-300 |
| Exploitation vector | Network |
| Public exploit | Public exploit code for vulnerability #1 is available. |
| Vulnerable software |
kernel (Red Hat package) Operating systems & Components / Operating system package or component Red Hat Enterprise Linux for Power, big endian Operating systems & Components / Operating system Red Hat Enterprise Linux for Scientific Computing Operating systems & Components / Operating system Red Hat Enterprise Linux for IBM z Systems Operating systems & Components / Operating system Red Hat Enterprise Linux Desktop Operating systems & Components / Operating system Red Hat Enterprise Linux Workstation Operating systems & Components / Operating system Red Hat Enterprise Linux Server Operating systems & Components / Operating system Other |
| Vendor |
Red Hat Inc. |
Security Bulletin
This security bulletin contains one low risk vulnerability.
1) Man-in-the-middle attack
EUVDB-ID: #VU357
Risk: Low
CVSSv4.0: 5.5 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Clear]
CVE-ID: CVE-2016-5696
CWE-ID:
CWE-300 - Channel Accessible by Non-Endpoint ('Man-in-the-Middle')
Exploit availability: Yes
DescriptionThe 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.
MitigationInstall updates from vendor's website.
kernel (Red Hat package): 2.6.32-71.el6 - 2.6.32-642.3.1.el6
Red Hat Enterprise Linux for Power, big endian: 6
Red Hat Enterprise Linux for Scientific Computing: 6
Red Hat Enterprise Linux for IBM z Systems: 6
Red Hat Enterprise Linux Desktop: 6
Red Hat Enterprise Linux Workstation: 6
Red Hat Enterprise Linux Server: 6.0
:
CPE2.3- cpe:2.3:o:red_hat:kernel_redhat_package:2.6.32-71.el6:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel_redhat_package:2.6.32-71.7.1.el6:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:kernel_redhat_package:2.6.32-71.14.1.el6:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_power_big_endian:6:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_scientific_computing:6:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_for_ibm_z_systems:6:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_desktop:6:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_workstation:6:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:o:red_hat:red_hat_enterprise_linux_server:6.0:*:*:*:*:red_hat_enterprise_linux:*:*
- cpe:2.3:::::*:*:*:*:*:*:*
https://access.redhat.com/errata/RHSA-2016:1664
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. However, proof of concept for this vulnerability is available.
