EulerOS 2.0 SP1 : kernel (EulerOS-SA-2016-1043)

This script is Copyright (C) 2017 Tenable Network Security, Inc.


Synopsis :

The remote EulerOS host is missing multiple security updates.

Description :

According to the versions of the kernel packages installed, the
EulerOS installation on the remote host is affected by the following
vulnerabilities :

- It was found that the RFC 5961 challenge ACK rate
limiting as implemented in the Linux kernel's
networking subsystem allowed an off-path attacker to
leak certain information about a given connection by
creating congestion on the global challenge ACK rate
limit counter and then measuring the changes by probing
packets. An off-path attacker could use this flaw to
either terminate TCP connection and/or inject payload
into non-secured TCP connection between two endpoints
on the network.(CVE-2016-5696)

- A flaw was found in the Linux kernel's keyring handling
code, where in key_reject_and_link() an uninitialised
variable would eventually lead to arbitrary free
address which could allow attacker to use a
use-after-free style attack. (CVE-2016-4470)

- A flaw was found in the way certain interfaces of the
Linux kernel's Infiniband subsystem used write() as
bi-directional ioctl() replacement, which could lead to
insufficient memory security checks when being invoked
using the splice() system call. A local unprivileged
user on a system with either Infiniband hardware
present or RDMA Userspace Connection Manager Access
module explicitly loaded, could use this flaw to
escalate their privileges on the system.(CVE-2016-4565)

Note that Tenable Network Security has extracted the preceding
description block directly from the EulerOS security advisory. Tenable
has attempted to automatically clean and format it as much as possible
without introducing additional issues.

See also :

http://www.nessus.org/u?52a2eecd

Solution :

Update the affected kernel packages.

Risk factor :

High / CVSS Base Score : 7.2
(CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C)
CVSS Temporal Score : 5.3
(CVSS2#E:U/RL:OF/RC:C)
Public Exploit Available : false

Family: Huawei Local Security Checks

Nessus Plugin ID: 99806 ()

Bugtraq ID:

CVE ID: CVE-2016-4470
CVE-2016-4565
CVE-2016-5696

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