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CVE-2019-3822

Estado: ModificadaCrítica (9.8)—

libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow. The function creating an outgoing NTLM type-3 header (`lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message()`), generates the request HTTP header contents based on previously received data. The check that exists to prevent the local buffer from getting overflowed is implemented wrongly (using unsigned math) and as such it does not prevent the overflow from happening.

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This output data can grow larger than the local buffer if very large 'nt response' data is extracted from a previous NTLMv2 header provided by the malicious or broken HTTP server. Such a 'large value' needs to be around 1000 bytes or more. The actual payload data copied to the target buffer comes from the NTLMv2 type-2 response header.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (16)

Canonical — Ubuntu LinuxDebian — Debian LinuxHaxx — LibcurlNetapp — Active IQ Unified ManagerNetapp — Clustered Data OntapNetapp — Oncommand InsightNetapp — Oncommand Workflow AutomationNetapp — SnapcenterOracle — Communications Operations MonitorOracle — Enterprise Manager OPS CenterOracle — Http ServerOracle — Mysql ServerOracle — Secure Global DesktopOracle — Services Tools BundleRedhat — Enterprise LinuxSiemens — Sinema Remote Connect Client

CWE

Referencias

JSON original (NVD)

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