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CVE-2019-3859

Quick assessment

Affected
The libssh2 Project libssh2
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.

libssh2是一款实现SSH2协议的客户端C库，它能够执行远程命令、文件传输，同时为远程的程序提供安全的传输通道。 libssh2中的‘_libssh2_packet_require’和‘_libssh2_packet_requirev’函数存在越界读取漏洞。远程攻击者可利用该漏洞造成拒绝服务或读取客户端内存中的数据。

AI Predicted 5.3 Difficulty: Moderate EPSS 6.28% · P93
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I. Basic Information for CVE-2019-3859

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
An out of bounds read flaw was discovered in libssh2 before 1.8.1 in the _libssh2_packet_require and _libssh2_packet_requirev functions. A remote attacker who compromises a SSH server may be able to cause a Denial of Service or read data in the client memory.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存读
Source: CVE Program / CVE List V5
Vulnerability Title
libssh2 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libssh2是一款实现SSH2协议的客户端C库，它能够执行远程命令、文件传输，同时为远程的程序提供安全的传输通道。 libssh2中的‘_libssh2_packet_require’和‘_libssh2_packet_requirev’函数存在越界读取漏洞。远程攻击者可利用该漏洞造成拒绝服务或读取客户端内存中的数据。
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 libssh2 Project libssh2 1.8.1 -

II. Public POCs for CVE-2019-3859

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III. Intelligence Information for CVE-2019-3859

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Vendor Advisories for CVE-2019-3859 (5)

Exploits & Public PoCs for CVE-2019-3859 (1)

Mailing List Discussions for CVE-2019-3859 (12)

Other References for CVE-2019-3859 (2)

IV. Related Vulnerabilities

Same product: libssh2
Same vendor: The libssh2 Project
Same weakness: CWE-125

V. Comments for CVE-2019-3859

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