{"answers":{"affected":"2 open source packages ship an affected version, including websocket-extensions. It affects 3 products.","exploited":"There is no known exploitation of CVE-2020-7663 in the wild and no public exploit code.","fix":"Upgrade websocket-extensions to 0.1.5 or later.","what":"CVE-2020-7663 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 2 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2020-7663 and fix it if it is affected.\n\nWhat it is: CVE-2020-7663 is a high-severity denial of service vulnerability in Canonical Ubuntu Linux, published on 2 Jun 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2020-7663 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- websocket-extensions (RubyGems): affected all versions; fixed in 0.1.5\n- websocket-extensions (RubyGems): affected all versions; fixed in 0.1.5\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2020-7663/ (Markdown: https://insights.sbomify.com/CVE-2020-7663/index.md)","id":"CVE-2020-7663","markdown":"https://insights.sbomify.com/CVE-2020-7663/index.md","name":"CVE-2020-7663","record":{"aliases":["DEBIAN-CVE-2020-7663","DLA-2334-1","GHSA-g6wq-qcwm-j5g2","OESA-2022-1553","OESA-2022-2093","SNYK-RUBY-WEBSOCKETEXTENSIONS-570830","SUSE-SU-2023:0127-1","UBUNTU-CVE-2020-7663","USN-4502-1","openSUSE-SU-2024:11357-1","openSUSE-SU-2024:13173-1","openSUSE-SU-2024:14180-1","openSUSE-SU-2025:15130-1","openSUSE-SU-2026:10368-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby websocket library","requires_auth":"none","summary":"An attacker can cause a Denial of Service in Ruby applications using the websocket-extensions library by sending a malicious Sec-WebSocket-Extensions header.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"snyk","cpe":[{"product":"ubuntu_linux","vendor":"canonical"},{"product":"debian_linux","vendor":"debian"},{"product":"websocket-extensions","vendor":"websocket-extensions_project"}],"cvss":{"score":7.5,"severity":"high","source":"nvd","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","version":"3.1"},"cwes":[],"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.","ecosystems":["RubyGems","SUSE:Linux Enterprise High Availability Extension 15 SP1","SUSE:Linux Enterprise High Availability Extension 15 SP2","SUSE:Linux Enterprise High Availability Extension 15 SP3","SUSE:Linux Enterprise High Availability Extension 15 SP4","openSUSE:Leap 15.4","openSUSE:Tumbleweed"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Regular Expression Denial of Service in websocket-extensions (RubyGem)","id":"CVE-2020-7663","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":"canonical:ubuntu_linux","products":["canonical:ubuntu_linux","debian:debian_linux"],"type":"denial_of_service","year":"2020"},"n_packages":11,"n_references":6,"next":{"headline":"Arbitrary File Write via Archive Extraction (Zip Slip)","id":"CVE-2020-7664"},"packages":[{"ecosystem":"RubyGems","fixed":["0.1.5"],"introduced":["0"],"last_affected":[],"package":"websocket-extensions","purl":null,"source":"GHSA-g6wq-qcwm-j5g2"},{"ecosystem":"RubyGems","fixed":["0.1.5"],"introduced":["0"],"last_affected":[],"package":"websocket-extensions","purl":"pkg:gem/websocket-extensions","source":"GHSA-g6wq-qcwm-j5g2"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP1","fixed":["0.1.3-150000.3.4.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-websocket-extensions","purl":"pkg:rpm/suse/rubygem-websocket-extensions\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1","source":"SUSE-SU-2023:0127-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP2","fixed":["0.1.3-150000.3.4.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-websocket-extensions","purl":"pkg:rpm/suse/rubygem-websocket-extensions\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2","source":"SUSE-SU-2023:0127-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP3","fixed":["0.1.3-150000.3.4.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-websocket-extensions","purl":"pkg:rpm/suse/rubygem-websocket-extensions\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3","source":"SUSE-SU-2023:0127-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP4","fixed":["0.1.3-150000.3.4.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-websocket-extensions","purl":"pkg:rpm/suse/rubygem-websocket-extensions\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP4","source":"SUSE-SU-2023:0127-1"},{"ecosystem":"openSUSE:Leap 15.4","fixed":["0.1.3-150000.3.4.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-websocket-extensions","purl":"pkg:rpm/opensuse/rubygem-websocket-extensions\u0026distro=openSUSE%20Leap%2015.4","source":"SUSE-SU-2023:0127-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["0.1.5-1.16"],"introduced":["0"],"last_affected":[],"package":"ruby3.2-rubygem-websocket-extensions","purl":"pkg:rpm/opensuse/ruby3.2-rubygem-websocket-extensions\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2024:13173-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["0.1.5-1.20"],"introduced":["0"],"last_affected":[],"package":"rubygem-websocket-extensions","purl":"pkg:rpm/opensuse/rubygem-websocket-extensions\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2024:14180-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["0.1.5-1.22"],"introduced":["0"],"last_affected":[],"package":"rubygem-websocket-extensions","purl":"pkg:rpm/opensuse/rubygem-websocket-extensions\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2025:15130-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["0.1.5-1.24"],"introduced":["0"],"last_affected":[],"package":"rubygem-websocket-extensions","purl":"pkg:rpm/opensuse/rubygem-websocket-extensions\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2026:10368-1"}],"prev":{"headline":"Regular Expression Denial of Service in websocket-extensions (NPM package)","id":"CVE-2020-7662"},"products":["websocket-extensions (ruby)"],"published":"2020-06-02","related":[{"cvss_score":9.8,"headline":"SaltStack Salt Authentication Bypass","id":"CVE-2020-11651","kev_date_added":"2021-11-03","published":"2020-04-30"},{"cvss_score":9.8,"headline":"OpenSMTPD Remote Code Execution","id":"CVE-2020-7247","kev_date_added":"2022-03-25","published":"2020-01-29"},{"cvss_score":9.8,"headline":"Exim Out-of-bounds Write","id":"CVE-2019-16928","kev_date_added":"2022-03-03","published":"2019-09-27"},{"cvss_score":9.8,"headline":"Exim Buffer Overflow","id":"CVE-2018-6789","kev_date_added":"2021-11-03","published":"2018-02-08"},{"cvss_score":9.8,"headline":"Oracle Java SE and Java SE Embedded Remote Code Execution","id":"CVE-2015-2590","kev_date_added":"2022-03-03","published":"2015-07-16"},{"cvss_score":9.8,"headline":"Oracle JRE Remote Code Execution","id":"CVE-2013-0422","kev_date_added":"2022-05-25","published":"2013-01-10"},{"cvss_score":9.8,"headline":"Oracle Java SE Runtime Environment (JRE) Arbitrary Code Execution","id":"CVE-2011-3544","kev_date_added":"2022-03-03","published":"2011-10-19"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"SUSE"},{"class":"attribution","licence":"CC BY 4.0","name":"SUSE","prefix":"openSUSE"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":null,"exploitation":null,"technical_impact":null},"state":"PUBLISHED","updated":"2024-08-04","vendors":["n/a"]},"summary":"An attacker can cause a Denial of Service in Ruby applications using the websocket-extensions library by sending a malicious Sec-WebSocket-Extensions header.","url":"https://insights.sbomify.com/CVE-2020-7663/"}