Multiple vulnerabilities in Node.js

1) Cross-site scripting

EUVDB-ID: #VU16167

Risk: Low

CVSSv3.1: 5.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12120

CWE-ID: CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to perform cross-site scripting (XSS) attacks.

The vulnerability exists due to insufficient sanitization of user-supplied data when the Node.js debugger being enabled by passing the --debug or debug flags to Node.js. A remote attacker can make a change to default to localhost, attach to the debug feature and execute arbitrary JavaScript code.

Successful exploitation of this vulnerability may allow a remote attacker to steal potentially sensitive information, change appearance of the web page, perform phishing and drive-by-download attacks.

Mitigation

Update to version 6.0.15.

Vulnerable software versions

Node.js: 6.0.0 - 6.14.4

CPE2.3

External links

http://nodejs.org/en/blog/vulnerability/november-2018-security-releases/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

2) Heap-based buffer overflow

EUVDB-ID: #VU16168

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12121

CWE-ID: CWE-122 - Heap-based Buffer Overflow

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to heap-based buffer overflow. A remote attacker can send many requests with the maximum size HTTP header of nearly 80kb/connection in combination with carefully handled completion of those headers, trigger memory corruption and cause the Node.js HTTP server to abort.

Mitigation

The vulnerability has been fixed in the versions 6.15.0, 8.14.0, 10.14.0, 11.3.0.

Vulnerable software versions

Node.js: 6.0.0 - 11.2.0

CPE2.3

External links

http://nodejs.org/en/blog/vulnerability/november-2018-security-releases/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

3) Resource exhaustion

EUVDB-ID: #VU16169

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12122

CWE-ID: CWE-400 - Resource exhaustion

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to the socket is destroyed on the next received chunk when headers are not completely received within this period. A remote attacker can send headers very slowly keeping HTTP or HTTPS connections and associated resources alive for a long period of time, consume excessive resources and cause the service to crash.

Mitigation

The vulnerability has been fixed in the versions 6.15.0, 8.14.0, 10.14.0, 11.3.0.

Vulnerable software versions

Node.js: 6.0.0 - 11.2.0

CPE2.3

External links

http://nodejs.org/en/blog/vulnerability/november-2018-security-releases/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

4) Spoofing attack

EUVDB-ID: #VU16170

Risk: Low

CVSSv3.1: 4.6 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12123

CWE-ID: CWE-451 - User Interface (UI) Misrepresentation of Critical Information (Clickjacking, spoofing)

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to conduct spoofing attack on the target system.

The vulnerability exists due to security decisions are made about the URL based on the hostname. A remote attacker can use a mixed case "javascript:" (e.g. "javAscript:") protocol and spoof the hostname when a Node.js application is using url.parse()to determine the URL hostname.

Mitigation

The vulnerability has been fixed in the versions 6.15.0, 8.14.0, 10.14.0, 11.3.0.

Vulnerable software versions

Node.js: 6.0.0 - 11.2.0

CPE2.3

External links

http://nodejs.org/en/blog/vulnerability/november-2018-security-releases/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

5) Improper input validation

EUVDB-ID: #VU16171

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-12116

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The disclosed vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists due to insufficient validation of user-provided input. A remote attacker can provide Unicode data for the path option of an HTTP request to trigger a second, unexpected, and user-defined HTTP request to made to the same server and cause the service to crash.

Mitigation

The vulnerability has been fixed in the versions 6.15.0, 8.14.0, 11.3.0.

Vulnerable software versions

Node.js: 6.0.0 - 11.2.0

CPE2.3

External links

http://nodejs.org/en/blog/vulnerability/november-2018-security-releases/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

6) Side-channel attack

EUVDB-ID: #VU15723

Risk: Low

CVSSv3.1: 4.4 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:U/RC:C]

CVE-ID: CVE-2018-5407

CWE-ID: CWE-208 - Information Exposure Through Timing Discrepancy

Exploit availability: Yes

Description

The vulnerability allows a physical attacker to obtain potentially sensitive information.

The vulnerability exists due to due to execution of engine sharing on SMT (e.g.Hyper-Threading) architectures when improper handling of information by the processor. A physical attacker can construct a timing side channel to hijack information from processes that are running in the same core.

Note: the vulnerability has been dubbed as PortSmash microarchitecture bug.

Mitigation

The vulnerability has been fixed in the versions 6.0.15, 8.14.0, 10.9.0.

Vulnerable software versions

Node.js: 4.8.0 - 10.8.0

CPE2.3

External links

http://nodejs.org/en/blog/vulnerability/november-2018-security-releases/

Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

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.

7) Information disclosure

EUVDB-ID: #VU15568

Risk: Low

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0735

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to obtain potentially sensitive information.

The vulnerability exists due to disclosure of the OpenSSL ECDSA signature algorithm. A remote attacker can use variations in the signing algorithm to conduct a timing side channel attack and recover the private key.

Mitigation

The vulnerability has been fixed in the versions 6.15.0, 8.14.0, 10.14.0, 11.3.0.

Vulnerable software versions

Node.js: 6.0.0 - 11.2.0

CPE2.3

External links

http://nodejs.org/en/blog/vulnerability/november-2018-security-releases/

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

8) Information disclosure

EUVDB-ID: #VU15668

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-0734

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a local attacker to obtain potentially sensitive information.

The vulnerability exists due to unspecified flaw in Digital Signature Algorithm (DSA). A local attacker can conduct a timing side-channel attack and recover the private key, which could be used to conduct further attacks.

Mitigation

The vulnerability has been fixed in the versions 10.14.0, 11.3.0.

Vulnerable software versions

Node.js: 10.0.0 - 11.2.0

CPE2.3

External links

http://nodejs.org/en/blog/vulnerability/november-2018-security-releases/

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.

Risk	Low
Patch available	YES
Number of vulnerabilities	8
CVE-ID	CVE-2018-12120 CVE-2018-12121 CVE-2018-12122 CVE-2018-12123 CVE-2018-12116 CVE-2018-5407 CVE-2018-0735 CVE-2018-0734
CWE-ID	CWE-79 CWE-122 CWE-400 CWE-451 CWE-20 CWE-208 CWE-200
Exploitation vector	Network
Public exploit	Public exploit code for vulnerability #6 is available.
Vulnerable software Subscribe	Node.js Server applications / Web servers
Vendor	Node.js Foundation