漏洞信息
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Vulnerability Title
Server-Side Request Forgery protection bypass in misp-modules html_to_markdown via IPv4-mapped IPv6 addresses
Vulnerability Description
A Server-Side Request Forgery (SSRF) protection bypass existed in the html_to_markdown expansion module of misp-modules.
The module attempts to prevent requests to loopback, private, link-local, and other restricted IP address ranges. However, IP addresses were compared against the blocked ranges without first normalising IPv4-mapped IPv6 addresses.
An authenticated attacker able to invoke the module could supply an IPv4-mapped IPv6 address, such as:
http://[::ffff:127.0.0.1]/
http://[::ffff:169.254.169.254]/
Alternatively, the attacker could use a hostname that resolves to an IPv4-mapped IPv6 address. These addresses were treated as IPv6 addresses and therefore did not match the corresponding blocked IPv4 ranges.
Successful exploitation could cause the misp-modules server to connect to services available through its loopback interface, internal network, or link-local network. This could expose internal web services, administrative interfaces, or cloud instance metadata, with retrieved content potentially returned to the attacker as converted Markdown.
The vulnerability has been addressed by normalising IPv4-mapped IPv6 addresses to their underlying IPv4 representation before applying the blocked-range checks. URLs without a valid hostname are now also rejected.
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:H/SI:N/SA:N/AU:Y/RE:M/U:Green
Vulnerability Type
服务端请求伪造(SSRF)
Vulnerability Title
misp-modules 服务端请求伪造漏洞
Vulnerability Description
MISP misp-modules是MISP组织的中间件。 misp-modules v3.0.8及之前版本存在服务端请求伪造漏洞,该漏洞源于html_to_markdown模块在对比IP地址时未对IPv4映射的IPv6地址进行规范化处理,导致服务端请求伪造(SSRF)保护被绕过,可能允许经过身份验证的攻击者通过回环接口、内部网络或链接本地网络暴露内部Web服务、管理接口或云实例元数据。
CVSS Information
N/A
Vulnerability Type
N/A