CVE-2020-7663

2020-06-0200:00:00

ubuntu.com

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

0.015 Low

EPSS

Percentile

86.8%

JSON

websocket-extensions ruby module prior to 0.1.5 allows Denial of Service
(DoS) via Regex Backtracking. The extension parser may take quadratic time
when parsing a header containing an unclosed string parameter value whose
content is a repeating two-byte sequence of a backslash and some other
character. This could be abused by an attacker to conduct Regex Denial Of
Service (ReDoS) on a single-threaded server by providing a malicious
payload with the Sec-WebSocket-Extensions header.

OSVersionArchitecturePackageVersionFilename
ubuntu18.04noarchruby-websocket-extensions< 0.1.2-1+deb9u1build0.18.04.1UNKNOWN
ubuntu20.04noarchruby-websocket-extensions< 0.1.2-1+deb9u1build0.20.04.1UNKNOWN
ubuntu16.04noarchruby-websocket-extensions< 0.1.2-1+deb9u1build0.16.04.1UNKNOWN

OS	Version	Architecture	Package	Version	Filename
ubuntu	18.04	noarch	ruby-websocket-extensions	< 0.1.2-1+deb9u1build0.18.04.1	UNKNOWN
ubuntu	20.04	noarch	ruby-websocket-extensions	< 0.1.2-1+deb9u1build0.20.04.1	UNKNOWN
ubuntu	16.04	noarch	ruby-websocket-extensions	< 0.1.2-1+deb9u1build0.16.04.1	UNKNOWN