CVE-2007-3495 in Basis Component 700
Summary
by MITRE
Multiple cross-site scripting (XSS) vulnerabilities in the SAP Internet Communication Framework (BC-MID-ICF) in the SAP Basis component 700 before SP12, and 640 before SP20, allow remote attackers to inject arbitrary web script or HTML via certain parameters associated with the default login error page.
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Analysis
by VulDB Data Team • 02/15/2022
The vulnerability identified as CVE-2007-3495 represents a critical cross-site scripting flaw within the SAP Internet Communication Framework component of SAP Basis systems. This weakness exists in specific versions of SAP software including SAP Basis 700 before Service Pack 12 and SAP Basis 640 before Service Pack 20, creating a significant security exposure for organizations utilizing these platforms. The vulnerability manifests through the default login error page functionality, which fails to properly sanitize user input parameters, thereby enabling malicious actors to execute arbitrary web scripts or HTML code within the context of authenticated user sessions.
The technical implementation of this vulnerability stems from insufficient input validation and output encoding within the SAP Internet Communication Framework's error handling mechanisms. When users encounter login failures, the system displays error messages that incorporate user-supplied parameters directly into the HTML response without adequate sanitization or encoding. This flaw falls under CWE-79 which specifically addresses cross-site scripting vulnerabilities, where web applications fail to properly validate or encode user-supplied data before incorporating it into dynamically generated web pages. The attack vector is particularly dangerous because it requires no authentication to exploit, making it a server-side vulnerability that can be leveraged by remote attackers to inject malicious code.
The operational impact of this vulnerability extends beyond simple script injection, as it can enable attackers to perform session hijacking, steal sensitive user credentials, redirect users to malicious websites, or execute arbitrary commands within the context of the victim's browser session. Attackers can craft malicious URLs containing script payloads that, when accessed by authenticated users, execute unauthorized actions on their behalf. This creates a persistent threat where compromised user sessions can be exploited for extended periods, potentially leading to complete system compromise. The vulnerability also aligns with ATT&CK technique T1059.007 for command and scripting interpreter, where attackers can establish persistent access through malicious script injection, and T1566.001 for spearphishing with social engineering, as the attack often begins with crafted login error page interactions.
Organizations affected by this vulnerability should immediately apply the relevant SAP service packs and patches, specifically upgrading to SAP Basis 700 SP12 or 640 SP20, which contain the necessary fixes for this XSS vulnerability. System administrators should also implement additional security measures including input validation at multiple layers, output encoding for all dynamic content, and regular security assessments of web applications. The remediation process should include thorough testing to ensure that the patches do not introduce compatibility issues with existing business applications. Security monitoring should be enhanced to detect unusual patterns in login error page access, as this may indicate exploitation attempts. Additionally, implementing web application firewalls and content security policies can provide additional defense-in-depth measures to prevent exploitation of this vulnerability.