mselbrede/cve-2024-51442CVE-2024-51442 write up and example config file
CVE-2024-51442 is a command injection vulnerability in minidlna/Readyshare version <= 1.3.3. This vulnerability can be exploited by running minidlnad with a specially crafter db_dir parameter used in minidlna.conf.
The vulnerability exists both in in the rescan functionality of the check_db function
minidlna.c
rescan:
CLEARFLAG(RESCAN_MASK);
if (ret < 0)
DPRINTF(E_WARN, L_GENERAL, "Creating new database at %s/files.db\n", db_path);
else if (ret == 1)
DPRINTF(E_WARN, L_GENERAL, "New media_dir detected; rebuilding...\n");
else if (ret == 2)
DPRINTF(E_WARN, L_GENERAL, "Removed media_dir detected; rebuilding...\n");
else
DPRINTF(E_WARN, L_GENERAL, "Database version mismatch (%d => %d); need to recreate...\n",
ret, DB_VERSION);
sqlite3_close(db);
snprintf(cmd, sizeof(cmd), "rm -rf %s/files.db %s/art_cache", db_path, db_path);
if (system(cmd) != 0)
DPRINTF(E_FATAL, L_GENERAL, "Failed to clean old file cache! Exiting...\n");
and when -R is passed as an optional command line parameter:
minidlna.c
case 'R':
snprintf(buf, sizeof(buf), "rm -rf %s/files.db %s/art_cache", db_path, db_path);
if (system(buf) != 0)
DPRINTF(E_FATAL, L_GENERAL, "Failed to clean old file cache %s. EXITING\n", db_path);
break;
The above code will run "rm -rf %s/files.db %s/art_cache with db_path as a parameter to the format string. db_path is picked up from the configuration file when processed by the code in options.c .
This vulnerability can be exploited by using the example minidlna.conf in this repository as the configuration file. This will open a file system window using xdg-open as a proof of concept.
minidlnad -d -f minidlna.conf