SB2018061803 - Denial of service in Node.js
Published: June 18, 2018
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 4 secuirty vulnerabilities.
1) Improper input validation (CVE-ID: CVE-2018-7161)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to a cleanup bug where objects are used in native code after they are no longer available when the affected software interacts with an HTTP/2 server. A remote attacker can send a specially crafted request that submits malicious input to the targeted node server that provides an HTTP/2 server and cause the node server to crash.
2) Improper input validation (CVE-ID: CVE-2018-7167)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to insufficient validation of user-supplied input. A remote attacker can supply Calling Buffer.fill() or Buffer.alloc() with some parameters and cause the server to hang.
3) Resource exhaustion (CVE-ID: CVE-2018-7164)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to insufficient input validation when reading from the network into JavaScript using the net.Socket object directly as a stream. A remote attacker can send tiny chunks of data in short succession, trigger resource exhaustion and cause the server to crash.
4) Improper input validation (CVE-ID: CVE-2018-7162)
The vulnerability allows a remote attacker to cause DoS condition on the target system.
The vulnerability exists due to insufficient input validation when TLS implementation. A remote attacker can send a specially crafted request that submits malicious input to the targeted node server and cause it to crash.
Remediation
Install update from vendor's website.