Plattform
other
Komponente
allegra
Behoben in
7.5.1
CVE-2023-51643 describes a Remote Code Execution (RCE) vulnerability affecting Allegra versions 7.5.0 build 29 and earlier. This flaw resides within the uploadFile method, allowing attackers to bypass authentication and execute arbitrary code on the system. The vulnerability has been addressed in version 7.5.1, and users are strongly advised to upgrade immediately.
Successful exploitation of CVE-2023-51643 allows an attacker to execute arbitrary code on the Allegra server with LOCAL SERVICE privileges. This could lead to complete system compromise, including data exfiltration, malware installation, and denial of service. The ability to bypass authentication significantly lowers the barrier to entry for attackers, making this a particularly concerning vulnerability. The impact is amplified if Allegra is deployed in a critical infrastructure or handles sensitive data, as an attacker could potentially gain access to confidential information or disrupt operations.
CVE-2023-51643 was disclosed on November 22, 2024. While no public exploits have been widely reported, the ease of bypassing authentication and the potential for remote code execution suggest a medium probability of exploitation. The vulnerability is tracked by ZDI-CAN-22510. Active monitoring and prompt patching are crucial to prevent potential attacks.
Organizations running Allegra versions 7.5.0 build 29 and earlier, particularly those with publicly accessible Allegra instances or those that allow user-uploaded files, are at significant risk. Shared hosting environments where multiple users share the same Allegra instance are also particularly vulnerable, as a compromise of one user's account could lead to the compromise of the entire server.
• windows / server:
Get-WinEvent -LogName Security -Filter "EventID = 4688 -MessageText '*\uploadFile*'" | fl -Property * • linux / server:
journalctl -xe | grep -i 'uploadFile'• generic web:
curl -I http://your-allegra-server/uploadFile..\..\etc\passwd | head -n 1disclosure
Exploit-Status
EPSS
1.14% (78% Perzentil)
CISA SSVC
CVSS-Vektor
The primary mitigation for CVE-2023-51643 is to upgrade Allegra to version 7.5.1 or later, which contains the fix for the directory traversal vulnerability. If immediate upgrade is not feasible, consider implementing stricter file upload restrictions and input validation on the Allegra server. Review and restrict user permissions to minimize the potential impact of a successful exploit. Monitor system logs for suspicious file upload activity and unusual process executions. After upgrading, confirm the fix by attempting a file upload with a path traversal payload to ensure the vulnerability is no longer exploitable.
Actualizar Allegra a la versión 7.5.1 o posterior. Esta versión corrige la vulnerabilidad de recorrido de directorios en el método uploadFile.
Schwachstellenanalysen und kritische Warnungen direkt in deinen Posteingang.
CVE-2023-51643 is a Remote Code Execution vulnerability affecting Allegra versions 7.5.0 build 29 and earlier. It allows attackers to execute code by exploiting a directory traversal flaw in the uploadFile method.
You are affected if you are running Allegra version 7.5.0 build 29 or an earlier version. Upgrade to version 7.5.1 or later to mitigate the risk.
The recommended fix is to upgrade Allegra to version 7.5.1 or later. If immediate upgrade is not possible, implement temporary workarounds like restricting upload locations and validating file paths.
There is currently no confirmed evidence of active exploitation in the wild, but the vulnerability's severity and ease of exploitation warrant immediate action.
Refer to the official Allegra security advisory for detailed information and updates regarding CVE-2023-51643. Check the Allegra website or contact Allegra support for the latest advisory.
Lade deine Abhängigkeitsdatei hoch und erfahre sofort, ob dich diese und andere CVEs treffen.