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CVE-2020-7663

Status Candidate

Overview

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.

Related Files

Red Hat Security Advisory 2020-4366-01
Posted Oct 27, 2020
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2020-4366-01 - Red Hat Satellite is a systems management tool for Linux-based infrastructure. It allows for provisioning, remote management, and monitoring of multiple Linux deployments with a single centralized tool. Issues addressed include HTTP request smuggling, cross site scripting, denial of service, memory leak, and traversal vulnerabilities.

tags | advisory, remote, web, denial of service, vulnerability, xss, memory leak
systems | linux, redhat
advisories | CVE-2018-11751, CVE-2018-3258, CVE-2019-12781, CVE-2019-16782, CVE-2020-10693, CVE-2020-10968, CVE-2020-10969, CVE-2020-11619, CVE-2020-14061, CVE-2020-14062, CVE-2020-14195, CVE-2020-14334, CVE-2020-14380, CVE-2020-5216, CVE-2020-5217, CVE-2020-5267, CVE-2020-7238, CVE-2020-7663, CVE-2020-7942, CVE-2020-7943, CVE-2020-8161, CVE-2020-8184, CVE-2020-8840, CVE-2020-9546, CVE-2020-9547, CVE-2020-9548
SHA-256 | c691cbaa83066b8d59e5188ddbfb88ab178e4310136cd824c67d6356f9911b5b
Ubuntu Security Notice USN-4502-1
Posted Sep 16, 2020
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 4502-1 - It was discovered that websocket-extensions does not properly parse special headers. A remote attacker could use this issue to cause regex backtracking, resulting in a denial of service.

tags | advisory, remote, denial of service
systems | linux, ubuntu
advisories | CVE-2020-7663
SHA-256 | cb283a5499e58bc7850ad73234317ce25342ba85d67bbd64fcc3eaa072e477ad
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