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CVE-2019-3822

Quick assessment

Affected
The curl Project curl
Exploitation
High exploitation probability; assess promptly
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Haxx libcurl是瑞典Haxx公司的一筐开源的客户端URL传输库。该产品支持FTP、SFTP、TFTP和HTTP等协议。 libcurl 7.36.0版本至7.64.0版本中的‘lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message’函数存在基于堆栈的缓冲区溢出漏洞。远程攻击者可利用该漏洞造成拒绝服务或可能执行任意代码。

AI Predicted 5.5 Difficulty: Moderate EPSS 12.87% · P96

Possible ATT&CK Techniques 1 AI

T1210.004
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I. Basic Information for CVE-2019-3822

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5
Vulnerability Title
Haxx libcurl 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Haxx libcurl是瑞典Haxx公司的一筐开源的客户端URL传输库。该产品支持FTP、SFTP、TFTP和HTTP等协议。 libcurl 7.36.0版本至7.64.0版本中的‘lib/vauth/ntlm.c:Curl_auth_create_ntlm_type3_message’函数存在基于堆栈的缓冲区溢出漏洞。远程攻击者可利用该漏洞造成拒绝服务或可能执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
The curl Project curl 7.64.0 -

II. Public POCs for CVE-2019-3822

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III. Intelligence Information for CVE-2019-3822

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Vendor Advisories for CVE-2019-3822 (12)

Mailing List Discussions for CVE-2019-3822 (1)

Other References for CVE-2019-3822 (1)

Same Patch Batch · The curl Project · 2019-02-06 · 3 CVEs total

CVE-2018-16890 Haxx libcurl 缓冲区错误漏洞
CVE-2019-3823 Haxx libcurl 缓冲区错误漏洞

IV. Related Vulnerabilities

Same product: curl
Same vendor: The curl Project
Same weakness: CWE-121

V. Comments for CVE-2019-3822

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