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Q1What is this vulnerability? (Essence + Consequences)
π¨ **Essence**: A critical file upload flaw in Vtiger CRM. π **Consequences**: Attackers can upload malicious PHP files and execute arbitrary code remotely.β¦
π οΈ **Root Cause**: Improper validation of file extensions. π« **Flaw**: The system fails to verify if uploaded files are actually safe, allowing disguised PHP scripts to bypass checks.β¦
π’ **Vendor**: Vtiger (US-based). π¦ **Product**: Vtiger CRM (based on SugarCRM). π **Affected Versions**: Version 5.4.0 and all earlier versions. β οΈ **Status**: Legacy software, likely unpatched.
Q4What can hackers do? (Privileges/Data)
π **Privileges**: Remote attackers gain the ability to execute code. π» **Action**: Upload and run malicious PHP scripts. π΅οΈ **Data Risk**: Complete control over the server, leading to data theft or defacement.
Q5Is exploitation threshold high? (Auth/Config)
π **Threshold**: LOW. π **Auth**: Remote exploitation (no authentication required mentioned). βοΈ **Config**: Relies on the presence of the vulnerable file. π **Ease**: Simple file upload vector makes it easy to trigger.
Q6Is there a public Exp? (PoC/Wild Exploitation)
π₯ **Public Exploit**: YES. π **Sources**: Exploit-DB (ID: 30787), SecurityFocus (ID: 61558), IBM X-Force. π **PoC**: Available on GitHub (shadofren/CVE-2013-3214).β¦
π **Check**: Scan for `vtigerolservice.php` endpoint. π **Tool**: Use vulnerability scanners to detect Vtiger CRM versions. π **Verify**: Check if the version is β€ 5.4.0.β¦
π‘οΈ **Official Fix**: The description implies the flaw is in the code logic. β³ **Status**: Published in 2020, but vulnerability dates to 2013.β¦
π§ **Workaround**: Disable file upload features if possible. π« **Block**: Restrict access to `vtigerolservice.php` via WAF or firewall rules. π§Ή **Clean**: Remove the vulnerable file if not needed.β¦