A security vulnerability has been discovered in the c-ares library that is bundled with all versions of Node.js. Due to the difficulty of triggering and making use of this vulnerability we currently consider this a low-severity security flaw for Node.js users.

More information at https://c-ares.haxx.se/adv20160929.html

A buffer overflow flaw was found in the V8 component of the Chromium browser.

Upstream bug(s):

https://code.google.com/p/chromium/issues/detail?id=606115

External References:

http://googlechromereleases.blogspot.com/2016/05/stable-channel-update.html

The uvrwlockt fallback implementation for Windows XP and Server 2003 in libuv before 1.7.4 does not properly prevent threads from releasing the locks of other threads, which allows attackers to cause a denial of service (deadlock) or possibly have unspecified other impact by leveraging a race condition.

A potential denial-of-service vector for Node.js TLS servers using client certificate authentication; TLS clients are also impacted. Details are available at <http://openssl.org/news/secadv/20151203.txt>.

An integer overflow flaw, leading to a buffer overflow, was found in the way the EVPEncodeUpdate() function of OpenSSL parsed very large amounts of input data. A remote attacker could use this flaw to crash an application using OpenSSL or, possibly, execute arbitrary code with the permissions of the user running that application.

A malicious client can exhaust a server's memory, resulting in a denial of service (DoS) by sending very large OCSP Status Request extensions in a single session.

This flaw is labelled high severity due to the ease of use for a DoS attack and Node.js servers using TLS are vulnerable.

A flaw was found in the way the DES/3DES cipher was used as part of the TLS/SSL protocol. A man-in-the-middle attacker could use this flaw to recover some plaintext data by capturing large amounts of encrypted traffic between TLS/SSL server and client if the communication used a DES/3DES based ciphersuite.

A bug whereby an HTTP socket may no longer have a parser associated with it but a pipelined request attempts to trigger a pause or resume on the non-existent parser, a potential denial-of-service vulnerability.

Fix defects in HTTP header parsing for requests and responses that can allow response splitting (CVE-2016-2216).

HTTP header parsing now aligns more closely with the HTTP spec including restricting the acceptable characters.

Introduce new --security-revert={cvenum} command line flag for selective reversion of specific CVE fixes allow the fix for CVE-2016-2216 to be selectively reverted using --security-revert=CVE-2016-2216.

Fix defects in HTTP header parsing for requests and responses that can allow request smuggling (CVE-2016-2086).

HTTP header parsing now aligns more closely with the HTTP spec including restricting the acceptable characters.

http: Properly validate for allowable characters in the reason argument in ServerResponse#writeHead(). Fixes a possible response splitting attack vector. This introduces a new case where throw may occur when configuring HTTP responses, users should already be adopting try/catch here.

This is a low severity security defect that that may make HTTP response splitting possible under certain circumstances. If user-input is passed to the reason argument to writeHead() on an HTTP response, a new-line character may be used to inject additional responses.

The fix for this defect introduces a new case where throw may occur when configuring HTTP responses. Users should already be adopting try/catch here.

Common Vulnerability Scoring System (CVSS) v3 Base Score:

Metric Score Base Score: 4.8 (Medium) Base Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N Attack Vector: Network (AV:N) Attack Complexity: High (AC:H) Privileges Required: None (PR:N) User Interaction: None (UI:N) Scope of Impact: Unchanged (S:U) Confidentiality Impact: Low (C:L) Integrity Impact: Low (I:L) Availability Impact: None (A:N)

Refer to the CVSS v3 Specification for details on the meanings and application of the vector components.

A man-in-the-middle (MITM) attacker may be able to execute a padding oracle attack to decrypt traffic when a connection uses an AES-CBC cipher and the server runs on an Intel CPU supporting AES-NI. This is a common configuration for TLS servers.

The OpenSSL project has labelled this vulnerability high severity.

Last updated 24 July 2024

Fix invalid wildcard certificate validation check whereby a TLS server may be able to serve an invalid wildcard certificate for its hostname due to improper validation of . in the wildcard string.

This is a high severity defect that would allow a malicious TLS server to serve an invalid wildcard certificate for its hostname and be improperly validated by a Node.js client. This is due to a flaw in the validation of . in the wildcard name string.

A flaw in the OpenSSL DSA implementation means that a non-constant time codepath is followed for certain operations. This has been demonstrated through a cache-timing attack to be sufficient for an attacker to recover the private DSA key.

This is very low severity for Node.js users due to the difficulty in taking advantage of this attack and because DSA is very rarely used.