Allegra saveFile ディレクトリトラバーサルによるリモートコード実行の脆弱性

The impact of CVE-2023-52333 is severe. Successful exploitation allows an attacker to execute arbitrary code with the privileges of the Allegra user, potentially gaining full control of the affected system. Given Allegra's registration mechanism allows for the creation of users with elevated privileges, an attacker could escalate their privileges to achieve domain dominance. This could lead to data breaches, system compromise, and disruption of critical services. The lack of robust input validation makes this vulnerability particularly concerning, as it simplifies the exploitation process.

Organizations utilizing Allegra for data management and analysis are at risk, particularly those with legacy configurations or shared hosting environments. Systems where Allegra is deployed with default user accounts or inadequate access controls are especially vulnerable. Users relying on Allegra's registration mechanism without proper security hardening are also at increased risk.

• windows / supply-chain: Monitor processes accessing Allegra's saveFile functionality. Use PowerShell to check for suspicious file creation attempts: Get-Process -Name Allegra | Get-Process -FileVersionInfo | Select-Object -ExpandProperty VersionInfo. • linux / server: Monitor Allegra's log files for unusual file access patterns. Use journalctl -u allegra to filter for errors related to file operations. • generic web: Monitor web server access logs for requests targeting Allegra's saveFile endpoint with unusual parameters. Use curl -I <allegrasavefileurl> to check response headers for anomalies.

1. 2024-11-22Disclosure

   disclosure

1. 予約済み2024-01-11
2. 公開日2024-11-22
3. 更新日2024-11-25
4. EPSS 更新日2026-04-02

The primary mitigation for CVE-2023-52333 is to immediately upgrade to Allegra version 7.5.1 or later. If upgrading is not immediately feasible, consider implementing temporary workarounds. While a direct WAF rule is unlikely to be effective due to the internal nature of the vulnerability, restricting access to the saveFile functionality based on user roles and permissions can reduce the attack surface. Thoroughly review user access controls and ensure only authorized users have access to file saving operations. After upgrading, confirm the fix by attempting to trigger the saveFile function with a malicious path; it should be rejected.