Bug 1595690 (CVE-2018-1000518) - CVE-2018-1000518 python-websockets: Improper handling of highly compressed data
Summary: CVE-2018-1000518 python-websockets: Improper handling of highly compressed data
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2018-1000518
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1595691
Blocks:
TreeView+ depends on / blocked
 
Reported: 2018-06-27 11:29 UTC by Andrej Nemec
Modified: 2021-10-25 09:46 UTC (History)
1 user (show)

Fixed In Version: python-websockets 5
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Clone Of:
Environment:
Last Closed: 2021-10-25 09:46:14 UTC
Embargoed:

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Description Andrej Nemec 2018-06-27 11:29:58 UTC 
python-websockets version 4 contains a CWE-409: Improper Handling of Highly Compressed Data (Data Amplification) vulnerability in Servers and clients, unless configured with compression=None that can result in Denial of Service by memory exhaustion. This attack appear to be exploitable via Sending a specially crafted frame on an established connection. This vulnerability appears to have been fixed in 5.

Upstream issue:

https://github.com/aaugustin/websockets/pull/407

Upstream patch:

https://github.com/aaugustin/websockets/pull/407/commits/5b96bdc9afbff9e9587be25a3af5933efbbafe1a
Comment 1 Andrej Nemec 2018-06-27 11:30:21 UTC 
Created python-websockets tracking bugs for this issue:

Affects: fedora-28 [bug 1595691]
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