{ "document": { "category": "csaf_base", "csaf_version": "2.0", "distribution": { "tlp": { "label": "WHITE" } }, "lang": "en", "notes": [ { "category": "legal_disclaimer", "text": "The Netherlands Cyber Security Center (henceforth: NCSC-NL) maintains this portal to enhance access to its information and vulnerabilities. The use of this information is subject to the following terms and conditions:\n\nThe vulnerabilities disclosed in this portal are gathered by NCSC-NL from a variety of open sources, which the user can retrieve from other platforms. NCSC-NL makes every reasonable effort to ensure that the content of this portal is kept up to date, and that it is accurate and complete. Nevertheless, NCSC-NL cannot entirely rule out the possibility of errors, and therefore cannot give any warranty in respect of its completeness, accuracy or real-time keeping up-to-date. NCSC-NL does not control nor guarantee the accuracy, relevance, timeliness or completeness of information obtained from these external sources. The vulnerabilities disclosed in this portal are intended solely for the convenience of professional parties to take appropriate measures to manage the risks posed to the cybersecurity. No rights can be derived from the information provided therein.\n\nNCSC-NL and the Kingdom of the Netherlands assume no legal liability or responsibility for any damage resulting from either the use or inability of use of the vulnerabilities disclosed in this portal. This includes damage resulting from the inaccuracy of incompleteness of the information contained in it.\nThe information on this page is subject to Dutch law. All disputes related to or arising from the use of this portal regarding the disclosure of vulnerabilities will be submitted to the competent court in The Hague. This choice of means also applies to the court in summary proceedings." } ], "publisher": { "category": "coordinator", "contact_details": "cert@ncsc.nl", "name": "National Cyber Security Centre", "namespace": "https://www.ncsc.nl/" }, "title": "CVE-2026-33029", "tracking": { "current_release_date": "2026-04-02T17:48:12.159085Z", "generator": { "date": "2026-02-17T15:00:00Z", "engine": { "name": "V.E.L.M.A", "version": "1.7" } }, "id": "CVE-2026-33029", "initial_release_date": "2026-03-30T16:52:57.361731Z", "revision_history": [ { "date": "2026-03-30T16:52:57.361731Z", "number": "1", "summary": "CVE created.| Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (3).| CWES updated (1)." }, { "date": "2026-03-30T16:53:06.602162Z", "number": "2", "summary": "NCSC Score created." }, { "date": "2026-03-30T18:26:33.565296Z", "number": "3", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| References created (2).| CWES updated (1)." }, { "date": "2026-03-30T18:26:35.807025Z", "number": "4", "summary": "NCSC Score updated." }, { "date": "2026-03-30T18:39:53.578111Z", "number": "5", "summary": "Source created.| CVE status created. (valid)| Description created for source.| CVSS created.| Products connected (1).| References created (2).| CWES updated (1)." }, { "date": "2026-03-30T18:39:55.130471Z", "number": "6", "summary": "NCSC Score updated." }, { "date": "2026-03-30T22:12:52.958205Z", "number": "7", "summary": "References created (1)." }, { "date": "2026-03-31T12:05:47.912612Z", "number": "8", "summary": "Source connected.| CVE status created. (valid)| Products connected (1).| References created (15)." }, { "date": "2026-03-31T12:05:53.584296Z", "number": "9", "summary": "NCSC Score updated." }, { "date": "2026-03-31T16:58:06.454276Z", "number": "10", "summary": "Source connected.| CVE status created. (valid)| EPSS created." }, { "date": "2026-03-31T16:58:09.278671Z", "number": "11", "summary": "NCSC Score updated." }, { "date": "2026-04-01T18:39:56.879438Z", "number": "12", "summary": "CVSS created.| Unknown change." }, { "date": "2026-04-01T18:40:00.500634Z", "number": "13", "summary": "NCSC Score updated." }, { "date": "2026-04-01T22:59:00.322277Z", "number": "14", "summary": "CVSS created." }, { "date": "2026-04-02T17:25:24.932591Z", "number": "15", "summary": "Products connected (1).| Product Identifiers created (1).| Exploits created (1)." }, { "date": "2026-04-02T17:25:29.648598Z", "number": "16", "summary": "NCSC Score updated." } ], "status": "interim", "version": "16" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/ui <2.3.4", "product": { "name": "vers:unknown/ui <2.3.4", "product_id": "CSAFPID-5968318" } } ], "category": "product_name", "name": "NGINX" } ], "category": "vendor", "name": "NGINX" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2.3.4", "product": { "name": "vers:unknown/<2.3.4", "product_id": "CSAFPID-5965559" } } ], "category": "product_name", "name": "nginx-ui" } ], "category": "vendor", "name": "0xJacky" }, { "branches": [ { "branches": [ { "category": "product_version_range", "name": "vers:unknown/<2.3.4", "product": { "name": "vers:unknown/<2.3.4", "product_id": "CSAFPID-5982828", "product_identification_helper": { "cpe": "cpe:2.3:a:nginxui:nginx_ui:*:*:*:*:*:*:*:*" } } } ], "category": "product_name", "name": "nginx_ui" } ], "category": "vendor", "name": "nginxui" } ] }, "vulnerabilities": [ { "cve": "CVE-2026-33029", "notes": [ { "category": "description", "text": "### Summary\nAn input validation vulnerability in the logrotate configuration allows an authenticated user to cause a complete Denial of Service (DoS). By submitting a negative integer for the rotation interval, the backend enters an infinite loop or an invalid state, rendering the web interface unresponsive.\n\n### Details\nThe vulnerability exists in the handler for the POST /api/settings endpoint. Specifically, the logrotate.interval field is accepted as a signed integer without lower-bound verification. When a negative value is processed by the backend logic responsible for scheduling or calculating the next rotation, it triggers a non-terminating loop. This consumes CPU resources and prevents the Go web server from handling further concurrent requests.\n\n**Environment:**\n- OS: Kali Linux 6.17.10-1kali1 (6.17.10+kali-amd64)\n- nginx-ui version: 2.3.3 (513) e5da6dd (go1.26.0 linux/amd64)\n- Deployment: Docker container\n- Run Command: \n```\ndocker run -dit \\\n --name=nginx-ui \\\n --restart=always \\\n -v /mnt/user4/appdata/nginx:/etc/nginx \\\n -v /mnt/user4/appdata/nginx-ui:/etc/nginx-ui \\\n -v /var/run/docker.sock:/var/run/docker.sock \\\n -p 8080:80 -p 8443:443 \\\n uozi/nginx-ui:latest\n```\n\n### PoC\n1. Authenticate to the nginx-ui dashboard.\n2. Send a POST request to /api/settings (using Burp Suite, Postman, or curl).\n3. Set the payload as follows:\n```\n.\n.\n.\n{\n \"logrotate\": {\n \"enabled\": true,\n \"cmd\": \"logrotate /etc/logrotate.d/nginx\",\n \"interval\": -1\n }\n}\n.\n.\n.\n```\n4. Observe that the web server stops responding to all subsequent requests immediately after the injection.\n\"image\"\n\n### Impact\nThis is a High-availability vulnerability (CWE-20: Improper Input Validation). Any authenticated user with access to settings can permanently hang the service.\n\nA patched version of nginx-ui is available at https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4.", "title": "github - https://api.github.com/advisories/GHSA-cp8r-8jvw-v3qg" }, { "category": "description", "text": "Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, an input validation vulnerability in the logrotate configuration allows an authenticated user to cause a complete Denial of Service (DoS). By submitting a negative integer for the rotation interval, the backend enters an infinite loop or an invalid state, rendering the web interface unresponsive. This issue has been patched in version 2.3.4.", "title": "nvd - https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33029" }, { "category": "description", "text": "Nginx UI is a web user interface for the Nginx web server. Prior to version 2.3.4, an input validation vulnerability in the logrotate configuration allows an authenticated user to cause a complete Denial of Service (DoS). By submitting a negative integer for the rotation interval, the backend enters an infinite loop or an invalid state, rendering the web interface unresponsive. This issue has been patched in version 2.3.4.", "title": "cveprojectv5 - https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33029.json" }, { "category": "other", "text": "0.00058", "title": "EPSS" }, { "category": "other", "text": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N", "title": "CVSSV4" }, { "category": "other", "text": "6.9", "title": "CVSSV4 base score" }, { "category": "other", "text": "4.2", "title": "NCSC Score" }, { "category": "other", "text": "There is product data available from source Certbundde", "title": "NCSC Score top increasing factors" }, { "category": "other", "text": "Is related to (a version of) an uncommon product, There is exploit data available from source Nvd", "title": "NCSC Score top decreasing factors" } ], "product_status": { "known_affected": [ "CSAFPID-5965559", "CSAFPID-5968318", "CSAFPID-5982828" ] }, "references": [ { "category": "external", "summary": "Source - github", "url": "https://api.github.com/advisories/GHSA-cp8r-8jvw-v3qg" }, { "category": "external", "summary": "Source - nvd", "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33029" }, { "category": "external", "summary": "Source - cveprojectv5", "url": "https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/33xxx/CVE-2026-33029.json" }, { "category": "external", "summary": "Source - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0931.json" }, { "category": "external", "summary": "Source - first", "url": "https://api.first.org/data/v1/epss?limit=10000&offset=0" }, { "category": "external", "summary": "Reference - cveprojectv5; github; nvd", "url": "https://github.com/0xJacky/nginx-ui/security/advisories/GHSA-cp8r-8jvw-v3qg" }, { "category": "external", "summary": "Reference - certbundde; cveprojectv5; github; nvd", "url": "https://github.com/0xJacky/nginx-ui/releases/tag/v2.3.4" }, { "category": "external", "summary": "Reference - certbundde; github", "url": "https://github.com/advisories/GHSA-cp8r-8jvw-v3qg" }, { "category": "external", "summary": "Reference - github", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33029" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0931.json" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0931" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-17151" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-17152" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-17154" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-17156" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-17158" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-17194" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-5hf2-vhj6-gj9m" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-fhh2-gg7w-gwpq" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-h6c2-x2m2-mwhf" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-m468-xcm6-fxg4" }, { "category": "external", "summary": "Reference - certbundde", "url": "https://github.com/advisories/GHSA-m8p8-53vf-8357" } ], "scores": [ { "cvss_v3": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "baseScore": 6.5, "baseSeverity": "MEDIUM" }, "products": [ "CSAFPID-5965559", "CSAFPID-5968318", "CSAFPID-5982828" ] } ], "title": "CVE-2026-33029" } ] }