{"id":"CVE-2026-114611","revision":null,"records":[{"revision":"04bd7de3dde94902b5ebaabb59d29c8a","observedAt":"2026-10-29T03:48:01.066+00:00","statement":{"source":"cve-program","id":"CVE-2026-114611","aliases":[],"title":"OCO-Server: MDM /profile endpoint accepts self-signed PKCS#7 signatures (PKCS7_NOVERIFY): device MDM identity (certificate + private key) disclosure and device-record hijack","description":"OCO-Server is a self-hosted endpoint management application for computer inventory, software deployment, and mobile device management. Prior to 1.2.3,the Apple MDM enrollment endpoint `frontend/api-mdm.php` verifies the signed enrollment-request plist with `openssl_pkcs7_verify(..., PKCS7_NOVERIFY, ...)`. `PKCS7_NOVERIFY` disables signer certificate chain and trust validation, so the signature only has to be self-consistent with whatever certificate is embedded in the PKCS#7 blob. A self-signed certificate from an unrelated attacker is accepted. Because the endpoint trusts the `SERIAL` field taken from the unverified payload, anyone who knows a registered device's serial number can sign a forged plist (`SERIAL` = victim device, attacker-chosen `UDID`) with an arbitrary self-signed certificate; POST it unauthenticated to `/api-mdm.php/profile` (Content-Type: `application/pkcs7-signature`); and receive the victim device's freshly minted MDM identity: a certificate with `CN=<serial>` issued by the server's internal MDM device CA, bundled with its private key in a PKCS#12 payload inside the returned `.mobileconfig` enrollment profile. Additionally, the victim's `mobile_device` database row is silently overwritten with the attacker-supplied `UDID` (device-record hijack). With the stolen certificate and key, the attacker can impersonate the victim device on all subsequent MDM traffic (`/checkin`, `/mdm`, `/parameters`), which authenticate callers by the certificate CN (the serial number) via `checkSignature()` in the same file. This yields control over the victim device's MDM relationship: reading its management data, replacing its push token, and disrupting or redirecting its enrollment. Version 1.2.3 fixes the issue.","state":0,"publishedAt":"2026-10-22T17:33:13.611+00:00","modifiedAt":"2026-10-29T02:23:10.004+00:00","affected":[{"ecosystem":"Vendor product","name":"OCO-Server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"schorschii\",\n                    \"product\": \"OCO-Server\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.2.3\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":"CRITICAL"}],"references":["https://github.com/schorschii/OCO-Server/security/advisories/GHSA-p549-5h7r-7639","https://github.com/schorschii/OCO-Server/commit/5cab5ad2461434816d706b7be9cc08bda15c1404","https://github.com/schorschii/OCO-Server/commit/f3a6591136f9bd92aff39ddfb26587e6dfdb64df"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-114611","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-114611","identifiers":["CVE-2026-114611"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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