CVE-2020-7663
CVSS v3
7.5
HIGH
EPSS Score
2.4 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
Description
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.
Technical details
- Published
- 2020-06-02
Frequently asked questions
What is CVE-2020-7663?
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.
Is CVE-2020-7663 actively exploited?
Active exploitation of CVE-2020-7663 has not been confirmed. The EPSS score is 2.4%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2020-7663?
CVE-2020-7663 has a CVSS v3 base score of 7.5 (HIGH severity).
Is CVE-2020-7663 affecting your environment?
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