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CVE-2020-1730

Quick assessment

Affected
Red Hat libssh
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

libssh是libssh组织的一个用于访问SSH服务的C语言开发包，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。 libssh 0.8.9之前版本和0.9.4之前版本中存在代码问题漏洞，该漏洞源于程序处理AES-CTR（或DES密码，如果启用）密码的方式存在错误。攻击者可利用该漏洞导致拒绝服务。

CVSS 5.3 · Medium EPSS 3.06% · P87

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service
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I. Basic Information for CVE-2020-1730

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in libssh versions before 0.8.9 and before 0.9.4 in the way it handled AES-CTR (or DES ciphers if enabled) ciphers. The server or client could crash when the connection hasn't been fully initialized and the system tries to cleanup the ciphers when closing the connection. The biggest threat from this vulnerability is system availability.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
空指针解引用
Source: CVE Program / CVE List V5
Vulnerability Title
libssh 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
libssh是libssh组织的一个用于访问SSH服务的C语言开发包，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。 libssh 0.8.9之前版本和0.9.4之前版本中存在代码问题漏洞，该漏洞源于程序处理AES-CTR（或DES密码，如果启用）密码的方式存在错误。攻击者可利用该漏洞导致拒绝服务。
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
Red Hat libssh libssh versions before 0.8.9 -

II. Public POCs for CVE-2020-1730

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III. Intelligence Information for CVE-2020-1730

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Vendor Advisories for CVE-2020-1730 (4)

Mailing List Discussions for CVE-2020-1730 (1)

Other References for CVE-2020-1730 (1)

IV. Related Vulnerabilities

Same product: libssh
Same vendor: Red Hat
Same weakness: CWE-476

V. Comments for CVE-2020-1730

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