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c2b1435b55
On 4 April 2017, Node.js versions v4.8.2 and v6.10.2 were
released. These versions bumped the vendored zlib library from
v1.2.8 to v1.2.11 in response to what it describes as low-severity
CVEs. In zlib v1.2.9, a change was made that causes an error to be
raised when a raw deflate stream is initialised with windowBits set
to 8.
In zlib v1.2.9, 8 become an invalid value for this parameter, and Node's zlib
module will crash if you call this:
```
zlib.createDeflateRaw({windowBits: 8})
```
On some versions this crashes Node and you cannot recover from it, while on some
versions it throws an exception. The permessage-deflate library up to
version v0.1.5 does make such a call with no try/catch
This commit reverts to the original behavior of zlib by gracefully changed
windowBits: 8 to windowBits: 9 for raw deflate streams.
PR-URL: https://github.com/nodejs-private/node-private/pull/95
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Evan Lucas <evanlucas@me.com>
Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
Reviewed-By: Sam Roberts <vieuxtech@gmail.com>
31 lines
727 B
JavaScript
31 lines
727 B
JavaScript
'use strict';
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require('../common');
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const assert = require('assert');
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const zlib = require('zlib');
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// Regression tests for bugs in the validation logic.
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assert.throws(() => {
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zlib.createGzip({ chunkSize: 0 });
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}, /^RangeError: Invalid chunk size: 0$/);
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assert.throws(() => {
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zlib.createGzip({ windowBits: 0 });
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}, /^RangeError: Invalid windowBits: 0$/);
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assert.throws(() => {
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zlib.createGzip({ memLevel: 0 });
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}, /^RangeError: Invalid memLevel: 0$/);
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{
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const stream = zlib.createGzip({ level: NaN });
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assert.strictEqual(stream._level, zlib.constants.Z_DEFAULT_COMPRESSION);
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}
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{
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const stream = zlib.createGzip({ strategy: NaN });
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assert.strictEqual(stream._strategy, zlib.constants.Z_DEFAULT_STRATEGY);
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}
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