CVE-2024-47175 is a high-severity vulnerability impacting Debian's libppd, part of the open-source printing system CUPS. This vulnerability allows attackers to exploit the function ppCreatePPDFromIPP2, which does not properly sanitize Internet Printing Protocol (IPP) attributes when creating a PPD buffer. The lack of sanitization can lead to user-controlled input, which can ultimately result in remote code execution (RCE) when combined with other functions, such as cfGetPrinterAttributes5. Organizations using affected versions of Debian's printing system are at risk of unauthorized access and code execution. Immediate action is required to mitigate these risks.
Published on September 26, 2024, this vulnerability has a CVSS score of 8.6, indicating a high severity level. The exploitability is assessed as high, requiring organizations to prioritize patching or remediation efforts. The urgency for defenders cannot be overstated, as the risk to organizations includes potential unauthorized code execution and system compromise.
The vulnerability's exploitation status is confirmed, with known exploits available. Although it has not been included in the Known Exploited Vulnerabilities (KEV) catalog, organizations should remain vigilant, as it could be part of an exploit chain leading to more severe impacts.
Organizations are advised to address this vulnerability as part of their immediate patching cycle to protect against potential attacks. The consequences of inaction could include significant damage to systems and data.
Vulnerability Details
The official description of CVE-2024-47175 highlights that the vulnerability arises from the `ppdCreatePPDFromIPP2` function in the libppd library, which fails to sanitize IPP attributes. The result is that attackers can inject malicious input into the PPD buffer, leading to remote code execution via Foomatic, a printing filter system.
This vulnerability is classified as CWE-20: Improper Input Validation. The CVSS score of 8.6 reflects its high severity, with an attack vector of NETWORK and low complexity, making it easier for attackers to exploit.
Technical Analysis
The root cause of this vulnerability is the improper handling of IPP attributes within the `ppdCreatePPDFromIPP2` function of libppd. When the function is called, it does not adequately sanitize the incoming IPP attributes before processing them into a PPD buffer. This lack of validation can allow attackers to craft specific IPP requests that manipulate the state of the application.
The attack vector is NETWORK, indicating that the vulnerability can be exploited remotely without requiring direct access to the system. The attack complexity is classified as LOW, meaning that an attacker does not require advanced skills to exploit this vulnerability.
No privileges are required to exploit this vulnerability, as it can be executed without authentication. User interaction is not necessary, which further increases the risk of exploitation. The integrity impact is rated as HIGH, meaning that successful exploitation can lead to unauthorized modification of system data.
Risk & Impact Analysis
Organizations using Debian with libppd should be aware of the significant risks associated with CVE-2024-47175. The potential for unauthorized remote code execution poses a severe threat to system integrity and confidentiality. The vulnerability can be exploited by attackers to compromise systems, leading to data breaches or further infiltration into secure networks.
The blast radius of this vulnerability is considerable, given the widespread use of CUPS in various environments. Organizations must assess their exposure based on the services they provide and the sensitivity of the information they handle.
Given its high CVSS score, organizations should prioritize addressing this vulnerability in their patch management cycle. The urgency for remediation is high, particularly for environments processing sensitive data or critical operations.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
CVE-2024-47175 affects the following products and versions: libppd versions prior to 2.1 beta1 and Debian Linux version 11.0. Organizations should ensure they are running patched versions to mitigate risks associated with this vulnerability.
Mitigation & Remediation
To address CVE-2024-47175, organizations should apply patches provided by Debian and OpenPrinting for the affected products. It is crucial to keep systems updated with the latest security patches to prevent exploitation. For environments where immediate patching is not feasible, organizations should consider implementing network controls to restrict access to CUPS services and monitor for unusual activity.
For more information on penetration testing and validating the security posture, organizations can refer to our penetration testing services.
Detection Guidance
Organizations should monitor logs for indicators of exploitation attempts, including unusual IPP requests or modifications to printer configurations. Monitoring for behavioral anomalies around CUPS services can also help identify potential exploitation. Specific network signatures may be developed to detect malicious IPP traffic targeting the vulnerability.
AppSecure Threat Intelligence Insight
CVE-2024-47175 highlights the critical need for organizations to prioritize security in open-source software components. The vulnerability exemplifies how improper input validation can lead to severe consequences, such as remote code execution. Security teams must ensure that they are regularly updating and auditing their software to mitigate similar risks.
This vulnerability also indicates a trend in the exploitation of open-source software, where attackers leverage flaws in widely used components to gain unauthorized access. Security teams should be proactive in their vulnerability management efforts to address these issues before they can be exploited.
For further insights on vulnerability management best practices, organizations can explore our vulnerability management program resources.
Organizations should also consider engaging in penetration testing methodology to assess their security posture against such vulnerabilities.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)