websocket-extensions npm module prior to 0.1.4 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.
CVSS 3.x
| Source | Score | Severity | Vector | Exploitability | Impact |
|---|---|---|---|---|---|
| nvd@nist.gov | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | 3.9 | 3.6 |
CVSS 2.0
Severity: MEDIUM
Problem Type: NVD-CWE-Other,
Products Affected
| Vendor | Product | Version |
|---|---|---|
| websocket-extensions_project | websocket-extensions | * |
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.
CVSS 2.0
Severity: MEDIUM
Problem Type: NVD-CWE-Other,
Products Affected
| Vendor | Product | Version |
|---|---|---|
| debian | debian_linux | 9.0 |
| canonical | ubuntu_linux | 18.04 |
| websocket-extensions_project | websocket-extensions | * |
| canonical | ubuntu_linux | 20.04 |
| canonical | ubuntu_linux | 16.04 |