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Inefficient Regular Expression Complexity The advisory has been revoked - it doesn't affect any version of package libwebsockets  (opens in a new tab)

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EPSS
4.4% (91st percentile)

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  • Snyk IDSNYK-RHEL7-LIBWEBSOCKETS-6590654
  • published7 Apr 2024
  • disclosed2 Jun 2020
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Introduced: 2 Jun 2020

CVE-2020-7663  (opens in a new tab)
CWE-1333  (opens in a new tab)

Amendment

The Red Hat security team deemed this advisory irrelevant for RHEL:7.

NVD Description

Note: Versions mentioned in the description apply only to the upstream libwebsockets package and not the libwebsockets package as distributed by RHEL.

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.