{"answers":{"affected":"4 open source packages ship an affected version, including rack. It affects 2 products.","exploited":"There is no known exploitation of CVE-2023-27539 in the wild and no public exploit code.","fix":"Upgrade rack to a fixed version for your release line: 2.2.6.4 or 3.0.6.1.","what":"CVE-2023-27539 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 9 Jan 2025. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2023-27539 and fix it if it is affected.\n\nWhat it is: CVE-2023-27539 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 9 Jan 2025. 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-2023-27539 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- rack (RubyGems): affected from 2.0.0; fixed in 2.2.6.4\n- rack (RubyGems): affected from 2.0.0; fixed in 2.2.6.4\n- rack (RubyGems): affected from 3.0.0; fixed in 3.0.6.1\n- rack (RubyGems): affected from 3.0.0; fixed in 3.0.6.1\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-2023-27539/ (Markdown: https://insights.sbomify.com/CVE-2023-27539/index.md)","id":"CVE-2023-27539","markdown":"https://insights.sbomify.com/CVE-2023-27539/index.md","name":"CVE-2023-27539","record":{"aliases":["DEBIAN-CVE-2023-27539","GHSA-c6qg-cjj8-47qp","MGASA-2024-0042","SUSE-SU-2023:1685-1","SUSE-SU-2023:1869-1","UBUNTU-CVE-2023-27539","openSUSE-SU-2024:12789-1","openSUSE-SU-2024:12805-1"],"analysis":{"component_type":"library","fix_type":"upgrade","impacts":["denial_of_service"],"network_reachable":"yes","non_default_config":false,"product_category":"Ruby web server interface","requires_auth":"none","summary":"Attackers can cause a denial of service in Rack applications by exploiting a flaw in the header parsing component.","user_interaction":"not_required","vuln_class":"denial_of_service"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"hackerone","cpe":[{"product":"debian_linux","vendor":"debian"},{"product":"rack","vendor":"rack"}],"cvss":{"score":5.3,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"},"cwes":[],"description":"There is a denial of service vulnerability in the header parsing component of Rack.","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","SUSE:OpenStack Cloud Crowbar 8","SUSE:OpenStack Cloud Crowbar 9","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":"Possible Denial of Service Vulnerability in Rack's header parsing","id":"CVE-2023-27539","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"RubyGems","product":"debian:debian_linux","products":["debian:debian_linux"],"type":"denial_of_service","year":"2023"},"n_packages":13,"n_references":7,"next":{"headline":"IBM Watson CP4D Data Stores denial of service","id":"CVE-2023-27540"},"packages":[{"ecosystem":"RubyGems","fixed":["2.2.6.4"],"introduced":["2.0.0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-c6qg-cjj8-47qp"},{"ecosystem":"RubyGems","fixed":["2.2.6.4"],"introduced":["2.0.0"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-c6qg-cjj8-47qp"},{"ecosystem":"RubyGems","fixed":["3.0.6.1"],"introduced":["3.0.0"],"last_affected":[],"package":"rack","purl":null,"source":"GHSA-c6qg-cjj8-47qp"},{"ecosystem":"RubyGems","fixed":["3.0.6.1"],"introduced":["3.0.0"],"last_affected":[],"package":"rack","purl":"pkg:gem/rack","source":"GHSA-c6qg-cjj8-47qp"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP1","fixed":["2.0.8-150000.3.18.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-rack","purl":"pkg:rpm/suse/rubygem-rack\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP1","source":"SUSE-SU-2023:1685-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP2","fixed":["2.0.8-150000.3.18.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-rack","purl":"pkg:rpm/suse/rubygem-rack\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP2","source":"SUSE-SU-2023:1685-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP3","fixed":["2.0.8-150000.3.18.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-rack","purl":"pkg:rpm/suse/rubygem-rack\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP3","source":"SUSE-SU-2023:1685-1"},{"ecosystem":"SUSE:Linux Enterprise High Availability Extension 15 SP4","fixed":["2.0.8-150000.3.18.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-rack","purl":"pkg:rpm/suse/rubygem-rack\u0026distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP4","source":"SUSE-SU-2023:1685-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 8","fixed":["1.6.13-3.19.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-rack","purl":"pkg:rpm/suse/rubygem-rack\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%208","source":"SUSE-SU-2023:1869-1"},{"ecosystem":"SUSE:OpenStack Cloud Crowbar 9","fixed":["1.6.13-3.19.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-rack","purl":"pkg:rpm/suse/rubygem-rack\u0026distro=SUSE%20OpenStack%20Cloud%20Crowbar%209","source":"SUSE-SU-2023:1869-1"},{"ecosystem":"openSUSE:Leap 15.4","fixed":["2.0.8-150000.3.18.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-rack","purl":"pkg:rpm/opensuse/rubygem-rack\u0026distro=openSUSE%20Leap%2015.4","source":"SUSE-SU-2023:1685-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["3.0.7-1.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-rack","purl":"pkg:rpm/opensuse/rubygem-rack\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2024:12805-1"},{"ecosystem":"openSUSE:Tumbleweed","fixed":["2.2.6.4-1.1"],"introduced":["0"],"last_affected":[],"package":"rubygem-rack-2.2","purl":"pkg:rpm/opensuse/rubygem-rack-2.2\u0026distro=openSUSE%20Tumbleweed","source":"openSUSE-SU-2024:12789-1"}],"prev":{"headline":"Auth bypass in https://github.com/curl/curl","id":"CVE-2023-27538"},"products":["Rack"],"published":"2025-01-09","related":[{"cvss_score":10,"headline":"ProFTPD Improper Access Control","id":"CVE-2015-3306","kev_date_added":"2026-10-08","published":"2015-05-18"},{"cvss_score":9.9,"headline":"RoundCube Webmail Deserialization of Untrusted Data","id":"CVE-2025-49113","kev_date_added":"2026-02-20","published":"2025-06-02"},{"cvss_score":9.8,"headline":"GNU InetUtils Argument Injection","id":"CVE-2026-24061","kev_date_added":"2026-01-26","published":"2026-01-21"},{"cvss_score":9.8,"headline":"Linux Kernel Improper Check for Unusual or Exceptional Conditions","id":"CVE-2025-39682","kev_date_added":"2026-09-18","published":"2025-09-05"},{"cvss_score":9.8,"headline":"Mozilla Firefox Use-After-Free","id":"CVE-2024-9680","kev_date_added":"2024-10-15","published":"2024-10-09"},{"cvss_score":9.8,"headline":"RARLAB UnRAR Directory Traversal","id":"CVE-2022-30333","kev_date_added":"2022-08-09","published":"2022-05-09"},{"cvss_score":9.8,"headline":"Roundcube Webmail SQL Injection","id":"CVE-2021-44026","kev_date_added":"2023-06-22","published":"2021-11-19"}],"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":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2025-01-09","vendors":["Rails"]},"summary":"Attackers can cause a denial of service in Rack applications by exploiting a flaw in the header parsing component.","url":"https://insights.sbomify.com/CVE-2023-27539/"}