7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.02 Low
EPSS
Percentile
88.8%
Debian LTS Advisory DLA-2334-1 [email protected]
https://www.debian.org/lts/security/ Chris Lamb
August 19, 2020 https://wiki.debian.org/LTS
Package : ruby-websocket-extensions
Version : 0.1.2-1+deb9u1
CVE ID : CVE-2020-7663
Debian Bug : #964274
It was discovered that there was a denial of service vulnerability
in ruby-websocket-extensions, a library for managing long-lived HTTP
"WebSocket" connections.
The parser took quadratic time when parsing a header containing an
unclosed string parameter value whose content is a repeating two-byte
sequence. This could be abused by an attacker to conduct a Regex
Denial Of Service (ReDoS) on a single-threaded server by providing a
malicious payload in the Sec-WebSocket-Extensions HTTP header.
For Debian 9 "Stretch", this problem has been fixed in version
0.1.2-1+deb9u1.
We recommend that you upgrade your ruby-websocket-extensions packages.
For the detailed security status of ruby-websocket-extensions please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/ruby-websocket-extensions
Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS
OS | Version | Architecture | Package | Version | Filename |
---|---|---|---|---|---|
Debian | 9 | all | ruby-websocket-extensions | < 0.1.2-1+deb9u1 | ruby-websocket-extensions_0.1.2-1+deb9u1_all.deb |
Debian | 10 | all | ruby-websocket-extensions | < 0.1.2-1+deb10u1 | ruby-websocket-extensions_0.1.2-1+deb10u1_all.deb |
7.5 High
CVSS3
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
5 Medium
CVSS2
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
AV:N/AC:L/Au:N/C:N/I:N/A:P
0.02 Low
EPSS
Percentile
88.8%