Package: node-static-module Version: 1.3.1-1 Severity: grave Tags: patch security fixed-upstream X-Debbugs-CC: secure-testing-t...@lists.alioth.debian.org forwarded: https://snyk.io/vuln/npm:concat-stream:20160901
concat-stream is writable stream that concatenates strings or binary data and
calls a callback with the result. Affected versions of the package are
vulnerable to Uninitialized Memory Exposure.
A possible memory disclosure vulnerability exists when a value of type number
is provided to the stringConcat() method and results in concatination of
uninitialized memory to the stream collection.
This is a result of unobstructed use of the Buffer constructor, whose insecure
default constructor increases the odds of memory leakage.
Details
Constructing a Buffer class with integer N creates a Buffer of length N with
raw (not "zero-ed") memory.
In the following example, the first call would allocate 100 bytes of memory,
while the second example will allocate the memory needed for the string "100":
// uninitialized Buffer of length 100
x = new Buffer(100);
// initialized Buffer with value of '100'
x = new Buffer('100');
concat-stream's stringConcat function uses the default Buffer constructor as-
is, making it easy to append uninitialized memory to an existing list. If the
value of the buffer list is exposed to users, it may expose raw server side
memory, potentially holding secrets, private data and code. This is a similar
vulnerability to the infamous Heartbleed flaw in OpenSSL.
You can read more about the insecure Buffer behavior on our blog.
Similar vulnerabilities were discovered in request, mongoose, ws and
sequelize.
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