CVE-2011-3201 in Evolution
Summary
by MITRE
GNOME Evolution before 3.2.3 allows user-assisted remote attackers to read arbitrary files via the attachment parameter to a mailto: URL, which attaches the file to the email.
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Analysis
by VulDB Data Team • 12/02/2024
The vulnerability identified as CVE-2011-3201 affects GNOME Evolution email client versions prior to 3.2.3, representing a significant security flaw in how the application processes mailto: URLs. This issue falls under the category of improper input validation and insecure direct object reference vulnerabilities, as defined by CWE-22 and CWE-434 respectively. The flaw enables remote attackers to manipulate file access through crafted mailto: URLs that include an attachment parameter, potentially allowing unauthorized file system access.
The technical implementation of this vulnerability occurs when GNOME Evolution processes mailto: URLs containing attachment parameters. When a user clicks on a maliciously crafted mailto: URL, the application interprets the attachment parameter as a file path and attempts to attach that file to the email composition window. This behavior bypasses normal file access controls and validation mechanisms, allowing attackers to specify any file path that the application process has permission to access. The vulnerability is particularly dangerous because it requires only user interaction to exploit, making it a user-assisted remote attack vector.
The operational impact of this vulnerability extends beyond simple information disclosure, as it could potentially enable attackers to access sensitive files such as configuration data, personal documents, or system files that the Evolution application process can read. This represents a significant escalation of privilege risk when combined with other vulnerabilities or when the application runs with elevated permissions. Attackers could leverage this flaw to gather intelligence about the target system, access confidential communications, or potentially escalate their privileges further by accessing system configuration files or credentials stored in accessible locations.
Security professionals should note that this vulnerability aligns with ATT&CK technique T1059.007 for command and scripting interpreter, where attackers could potentially use this flaw to gain access to files that might contain credentials or other sensitive information. The exploitation typically involves crafting a malicious mailto: URL with a specially formatted attachment parameter that points to a target file on the victim's system. Organizations using GNOME Evolution should prioritize immediate patching to version 3.2.3 or later, as this vulnerability represents a clear path for unauthorized file access that could compromise entire email communication systems.
Mitigation strategies include not only updating to the patched version of GNOME Evolution but also implementing email security measures such as URL filtering and attachment scanning. System administrators should consider restricting user access to potentially dangerous applications or implementing sandboxing techniques to limit the impact of such vulnerabilities. Additionally, user education regarding the dangers of clicking untrusted mailto: links and the importance of verifying email sources remains crucial in preventing exploitation of this class of vulnerability. The vulnerability demonstrates the importance of proper input validation in URL processing and highlights the risks associated with applications that do not properly sanitize user-supplied parameters before processing them as file system operations.