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CVE-2023-6004— Libssh: proxycommand/proxyjump features allow injection of malicious code through hostname

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 8
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 0.10.x版本，0.9.x版本，0.8.x版本存在安全漏洞，该漏洞源于ProxyCommand/ProxyJump功能允许攻击者通过hostname注入恶意代码。

CVSS 4.8 · Medium EPSS 0.45% · P37

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2023-6004

Vulnerability Information
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Vulnerability Title
Libssh: proxycommand/proxyjump features allow injection of malicious code through hostname
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw was found in libssh. By utilizing the ProxyCommand or ProxyJump feature, users can exploit unchecked hostname syntax on the client. This issue may allow an attacker to inject malicious code into the command of the features mentioned through the hostname parameter.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
输出中的特殊元素转义处理不恰当(注入)
Source: CVE Program / CVE List V5
Vulnerability Title
libssh 安全漏洞
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 0.10.x版本，0.9.x版本，0.8.x版本存在安全漏洞，该漏洞源于ProxyCommand/ProxyJump功能允许攻击者通过hostname注入恶意代码。
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
Red Hat Red Hat Enterprise Linux 8 0:0.9.6-14.el8 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 8 0:0.9.6-14.el8 ~ * cpe:/a:redhat:enterprise_linux:8::appstream
Red Hat Red Hat Enterprise Linux 9 0:0.10.4-13.el9 ~ * cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat Red Hat Enterprise Linux 9 0:0.10.4-13.el9 ~ * cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7

II. Public POCs for CVE-2023-6004

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III. Intelligence Information for CVE-2023-6004

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Vendor Advisories for CVE-2023-6004 (4)

Mailing List Discussions for CVE-2023-6004 (1)

Other References for CVE-2023-6004 (1)

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 8
Same vendor: Red Hat
Same weakness: CWE-74

V. Comments for CVE-2023-6004

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