{"id":18694,"date":"2025-12-31T02:58:31","date_gmt":"2025-12-31T02:58:31","guid":{"rendered":"https:\/\/sekuritasit.com\/?p=18694"},"modified":"2025-12-31T02:58:31","modified_gmt":"2025-12-31T02:58:31","slug":"mongobleed-unauthenticated-memory-leak","status":"publish","type":"post","link":"https:\/\/sekuritasit.com\/index.php\/2025\/12\/31\/mongobleed-unauthenticated-memory-leak\/","title":{"rendered":"MongoBleed Unauthenticated Memory Leak"},"content":{"rendered":"\n\n\n\n <\/colgroup>\n\n\n\n\n
\n

\n What is the Vulnerability?\n <\/p>\n<\/td>\n

\n

\n A critical vulnerability in MongoDB Server\u2019s handling of zlib-compressed network traffic allows a fully unauthenticated remote attacker to read uninitialized heap memory and leak sensitive data directly from server memory.<\/p>\n

The flaw stems from improper buffer length handling during zlib decompression. By sending specially crafted malformed packets, an attacker can cause MongoDB to return memory contents beyond intended boundaries, exposing fragments of sensitive in-process data.<\/p>\n

Because exploitation occurs before authentication, any MongoDB instance with its network port exposed is vulnerable, significantly increasing real-world attack surface and risk.<\/p>\n

A functional proof-of-concept exploit is publicly available and has already been leveraged by attackers, as real-world exploitation has been observed, and CISA has added this vulnerability to its Known Exploited Vulnerabilities (KEV) Catalog, based on evidence of active exploitation.\n <\/p>\n<\/td>\n<\/tr>\n

\n

\n What is the recommended Mitigation?\n <\/p>\n<\/td>\n

\n
    \n
  • \n

    \n Patch MongoDB servers to versions:
    \n
    \n 8.2.3+, 8.0.17+, 7.0.28+, 6.0.27+, 5.0.32+, 4.4.30+\n <\/p>\n<\/li>\n

  • \n

    \n Disable zlib compression if patching cannot yet occur.\n <\/p>\n<\/li>\n

  • \n

    \n Restrict internet exposure of MongoDB instances.\n <\/p>\n<\/li>\n

  • \n

    \n Post-Exploit Mitigation
    \n
    \n – Rotate all potentially exposed credentials and secrets
    \n
    \n – Review logs for indicators of compromise, including unusual pre-auth requests
    \n
    \n – Monitor public exploit artifacts (e.g., GitHub PoC repos) and network scans\n <\/p>\n<\/li>\n<\/ul>\n<\/td>\n<\/tr>\n

\n

\n What FortiGuard Coverage is available?\n <\/p>\n<\/td>\n

\n