NetSight
IP …
critical9.8

CVE-2019-3822

libcurl versions from 7.36.0 to before 7.64.0 are vulnerable to a stack-based buffer overflow.

Impact

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. 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.

Affected products

VendorProductAffected versions
HaxxLibcurl
from 7.36.0 before 7.64.0
CanonicalUbuntu Linux
Versions 14.04, 16.04, 18.04, 18.10
DebianDebian Linux
Version 9.0
NetappActive Iq Unified Manager
from 7.3
from 9.5
NetappClustered Data Ontap
All versions
NetappOncommand Insight
All versions
NetappOncommand Workflow Automation
All versions
NetappSnapcenter
All versions
SiemensSinema Remote Connect Client
through 2.0
OracleCommunications Operations Monitor
Versions 3.4, 4.0
OracleEnterprise Manager Ops Center
Versions 12.3.3, 12.4.0
OracleHttp Server
Version 12.2.1.3.0

Weakness classification

CWE-121CWE-787

References