CVE-2023-26103

2023-02-2505:15:12

CWE-1333

[email protected]

web.nvd.nist.gov

package deno

cve-2023-26103

upgradewebsocket

regex

redos

web socket server

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

5.9 Medium

AI Score

Confidence

High

0.001 Low

EPSS

Percentile

48.1%

JSON

Versions of the package deno before 1.31.0 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the upgradeWebSocket function, which contains regexes in the form of /s*,s*/, used for splitting the Connection/Upgrade header. A specially crafted Connection/Upgrade header can be used to significantly slow down a web socket server.