CVE-2008-7273 in Iceweasel-firegpg
Summary
by MITRE
A symlink issue exists in Iceweasel-firegpg before 0.6 due to insecure tempfile handling.
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Analysis
by VulDB Data Team • 02/23/2024
The vulnerability identified as CVE-2008-7273 represents a critical symlink attack vector affecting the Iceweasel-firegpg plugin version 0.6 and earlier. This issue stems from insecure temporary file handling practices that create opportunities for privilege escalation and arbitrary code execution. The flaw specifically manifests in how the application manages temporary files during cryptographic operations, particularly when dealing with symbolic links that can be manipulated by unprivileged users to gain elevated system access.
The technical implementation of this vulnerability resides in the improper creation and management of temporary files within the firegpg plugin architecture. When the application processes cryptographic operations, it generates temporary files that are susceptible to symlink attacks. An attacker can create malicious symbolic links in the temporary file directories, which the application will subsequently traverse and modify, leading to unauthorized file access or modification. This behavior directly violates security principles outlined in CWE-377, which addresses insecure temporary file handling practices that expose systems to symlink-based attacks.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass potential data compromise and system integrity violations. Attackers exploiting this weakness can manipulate temporary files to redirect operations to arbitrary locations, potentially allowing them to inject malicious code or access sensitive cryptographic materials. The vulnerability particularly affects systems where the firegpg plugin is used for email encryption, creating risks for confidential communications and digital signatures. This issue aligns with ATT&CK technique T1059.007, which covers execution through symlink manipulation in system processes, and T1548.001, covering abuse of privilege escalation techniques.
The remediation approach for CVE-2008-7273 requires immediate patching of the firegpg plugin to version 0.6 or later, where the insecure temporary file handling has been corrected. System administrators should implement proper file permissions and temporary directory management to prevent unauthorized symlink creation. Additionally, organizations should conduct comprehensive security assessments of their cryptographic toolchains and ensure that all temporary file operations follow secure coding practices as recommended by the Open Web Application Security Project. The vulnerability demonstrates the critical importance of proper temporary file handling in security-sensitive applications and serves as a reminder of the potential consequences of inadequate sandboxing and privilege separation mechanisms in cryptographic software implementations.