CVE-2012-3413 in KDE PIM
Summary
by MITRE
The HTMLQuoteColorer::process function in messageviewer/htmlquotecolorer.cpp in KDE PIM 4.6 through 4.8 does not disable JavaScript, Java, and Plugins, which allows remote attackers to inject arbitrary web script or HTML via a crafted email.
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Analysis
by VulDB Data Team • 12/07/2021
The vulnerability identified as CVE-2012-3413 resides within the HTMLQuoteColorer::process function of KDE PIM versions 4.6 through 4.8, specifically in the messageviewer/htmlquotecolorer.cpp component. This flaw represents a critical security oversight that enables remote code execution through email message manipulation, fundamentally compromising the email client's security boundaries. The vulnerability operates by failing to properly sanitize or disable potentially dangerous web scripting capabilities when processing quoted email content, creating an attack surface that adversaries can exploit to inject malicious code directly into email viewing contexts.
The technical implementation of this vulnerability stems from inadequate input validation and security boundary enforcement within the HTML processing pipeline of KDE PIM's message viewer. When users open emails containing crafted HTML content with embedded JavaScript, Java applets, or plugin references, the HTMLQuoteColorer::process function fails to neutralize these elements before rendering them in the email interface. This omission creates a classic cross-site scripting vulnerability where malicious content can execute within the trusted context of the email client, bypassing normal security restrictions that would typically prevent such code execution. The vulnerability maps directly to CWE-79, which describes cross-site scripting flaws, and specifically aligns with CWE-116, concerning improper neutralization of special elements during web input processing.
The operational impact of this vulnerability extends far beyond simple script injection, as it provides attackers with a sophisticated vector for delivering malicious payloads through seemingly benign email communications. Remote attackers can craft emails containing embedded malicious scripts that execute when recipients view the messages, potentially leading to complete system compromise through techniques such as credential theft, malware delivery, or privilege escalation. The attack surface is particularly concerning because email clients like KDE PIM are frequently used in enterprise environments where users may have elevated privileges or access to sensitive information. This vulnerability effectively transforms the email client into an attack vector that can bypass traditional network security controls and directly compromise user workstations, representing a significant threat to organizational security postures.
Mitigation strategies for CVE-2012-3413 should prioritize immediate patching of affected KDE PIM versions, with administrators implementing comprehensive email filtering solutions that scan for and quarantine suspicious HTML content. Security configurations should enforce strict disabling of JavaScript, Java, and plugin execution within email viewers, while also implementing content security policies that prevent dynamic code execution. Organizations should consider deploying email security gateways that can detect and block malicious HTML injection attempts, alongside regular security awareness training to help users recognize potentially malicious email content. The remediation process should include thorough testing of patched systems to ensure that legitimate email functionality remains intact while eliminating the security vulnerability. Additionally, system administrators should monitor for potential exploitation attempts through network traffic analysis and implement proper incident response procedures to handle cases where the vulnerability may have been successfully exploited, aligning with ATT&CK technique T1190 for exploitation of remote services and T1059 for command and scripting interpreter usage.