Denial of Service (DoS) Affecting ovs package, versions [,2.7.2)
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Test your applications- Snyk ID SNYK-PYTHON-OVS-40696
- published 9 Nov 2017
- disclosed 3 Mar 2017
- credit Bhargava Shastry
Introduced: 3 Mar 2017
CVE-2017-9264 Open this link in a new tabHow to fix?
Upgrade ovs
to version 2.7.2 or higher.
Overview
ovs
is Open vSwitch library.
Affected versions of the package are vulnerable to Denial of Service (DoS).
In lib/conntrack.c in the firewall implementation in Open vSwitch (OvS) 2.6.1, there is a buffer over-read while parsing malformed TCP, UDP, and IPv6 packets in the functions extract_l3_ipv6
, extract_l4_tcp
, and extract_l4_udp
that can be triggered remotely.
Details
Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.
Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.
One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.
When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.
Two common types of DoS vulnerabilities:
High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.
Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm
ws
package