CVE-2015-8563 in Joomla
Summary
by MITRE
Cross-site request forgery (CSRF) vulnerability in the com_templates component in Joomla! 3.2.0 through 3.3.x and 3.4.x before 3.4.6 allows remote attackers to hijack the authentication of unspecified victims via unknown vectors.
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Analysis
by VulDB Data Team • 04/21/2019
The CVE-2015-8563 vulnerability represents a critical cross-site request forgery flaw within Joomla! content management systems affecting versions 3.2.0 through 3.3.x and 3.4.x prior to 3.4.6. This vulnerability resides in the com_templates component, which handles template management functionality within the Joomla framework. The flaw enables remote attackers to manipulate authenticated sessions by exploiting the absence of proper CSRF protection mechanisms in the affected template management interfaces. The vulnerability's impact extends to unspecified victims who may be tricked into executing unauthorized actions within the context of their authenticated Joomla sessions. This type of vulnerability falls under the CWE-352 category, which specifically addresses Cross-Site Request Forgery weaknesses in software applications. The vulnerability's classification aligns with ATT&CK technique T1566.001, which covers the exploitation of web application vulnerabilities through CSRF attacks.
The technical implementation of this CSRF vulnerability stems from the lack of anti-CSRF tokens or validation mechanisms within the template management component's request processing. When legitimate users navigate to affected Joomla pages, attackers can craft malicious requests that exploit the trust relationship between the user's browser and the Joomla application. The vulnerability's exploitation occurs through unknown vectors that likely involve the manipulation of template-related parameters or actions without proper session validation. Attackers can potentially perform administrative actions such as modifying template settings, uploading malicious files, or altering site configurations without the victim's knowledge or consent. This flaw essentially allows attackers to bypass the normal authentication flow and execute unauthorized operations with the privileges of authenticated users.
The operational impact of CVE-2015-8563 extends beyond simple session hijacking to encompass potential complete system compromise. An attacker who successfully exploits this vulnerability could gain unauthorized access to critical administrative functions within the Joomla installation. The consequences include unauthorized modification of website templates, potential injection of malicious code, and the ability to manipulate site content or configuration settings. Given that templates are fundamental to website presentation and functionality, attackers could use this vulnerability to create persistent backdoors or redirect users to malicious sites. The vulnerability's presence in multiple Joomla version streams means that organizations running any of these affected versions face significant risk of exploitation, particularly in environments where users may be tricked into visiting malicious sites or where automated exploitation tools are deployed.
Mitigation strategies for CVE-2015-8563 primarily involve immediate patching of affected Joomla installations to version 3.4.6 or later, which contains the necessary CSRF protection mechanisms. Organizations should also implement additional defensive measures including regular security audits of their Joomla installations, monitoring for unauthorized template modifications, and ensuring proper input validation throughout the application. Network-level protections such as web application firewalls can help detect and block suspicious CSRF attempts, though they cannot replace proper patching. Security configurations should include enabling CSRF tokens for all administrative actions, implementing proper session management, and conducting regular vulnerability assessments. The remediation process should also involve educating administrators about the dangers of CSRF attacks and implementing secure coding practices that align with OWASP guidelines for preventing cross-site request forgery vulnerabilities. Organizations should also consider implementing multi-factor authentication and least privilege access controls to reduce the potential impact of successful CSRF exploitation attempts.