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{"bugzilla": {"description": "libntlm: stack-based buffer overflow in buildSmbNtlmAuthRequest in smbutil.c", "id": "1768463", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1768463"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-119->CWE-121", "details": ["Libntlm through 1.5 relies on a fixed buffer size for tSmbNtlmAuthRequest, tSmbNtlmAuthChallenge, and tSmbNtlmAuthResponse read and write operations, as demonstrated by a stack-based buffer over-read in buildSmbNtlmAuthRequest in smbutil.c for a crafted NTLM request.", "A flaw was found in the libntlm NTLM library where it was vulnerable to a buffer overflow in the buildSmbNtlmAuthRequest_userlen() function. If an application using this library does not check input length before calling the function, an attacker could use this flaw to send a specially crafted request that could crash the application, or possibly trigger code execution."], "mitigation": {"lang": "en:us", "value": "The calling application must verify that the input username and domain fit in the 1024 byte buffer."}, "name": "CVE-2019-17455", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Will not fix", "package_name": "libntlm", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "libntlm", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/a:redhat:network_satellite:5", "fix_state": "Out of support scope", "package_name": "libntlm", "product_name": "Red Hat Satellite 5"}], "public_date": "2019-10-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2019-17455\nhttps://nvd.nist.gov/vuln/detail/CVE-2019-17455"], "statement": "The vulnerability is rated Medium because no package in Red Hat Enterprise Linux versions 6 and 7 is using Libntlm. Most 3rd party applications using Libntlm are command line clients and would be affected via a command line option or a configuration file, which are local vectors.", "threat_severity": "Moderate", "upstream_fix": "libntlm 1.6"}