The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applicationsLearn about Denial of Service (DoS) vulnerabilities in an interactive lesson.
Start learningUpgrade github.com/pires/go-proxyproto
to version 0.5.0 or higher.
github.com/pires/go-proxyproto is a Go library implementation of the PROXY protocol, versions 1 and 2.
Affected versions of this package are vulnerable to Denial of Service (DoS) via the parseVersion1()
function.
The reader in this package is a default bufio.Reader
wrapping a net.Conn
. It will read from the connection until it finds a newline.
Since no limits are implemented in the code, a deliberately malformed V1
header could be used to exhaust memory in a server process using this code - and create a DoS. This can be exploited by sending a stream starting with PROXY
and continuing to send data (which does not contain a newline) until the target stops acknowledging.
The risk here is small, because only trusted sources should be allowed to send proxy protocol headers.
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