The vulnerability identified as CVE-2023-29491 affects GNU ncurses versions prior to 6.4 20230408. This vulnerability allows local users to trigger security-relevant memory corruption through malformed data in a terminfo database file, which can be found in $HOME/.terminfo or accessed via the TERMINFO or TERM environment variable. The CVSS score assigned to this vulnerability is 7.8, categorizing it as high severity, which signifies a notable risk that organizations should take seriously.
Risk to organizations includes potential unauthorized access and manipulation of system resources, leading to data leakage or system instability. Given the local attack vector and the low privileges required, it is critical for organizations to prioritize remediation efforts.
The vulnerability was published on April 14, 2023, and has since been classified with a high severity rating due to its impacts on confidentiality, integrity, and availability, all rated as high. It is important for organizations to understand that while there are no public exploits confirmed, the risks associated with this vulnerability demand immediate attention and action.
Organizations should prioritize patching immediately. It is advisable to review the configurations and ensure that all systems are updated to the latest version of GNU ncurses.
Vulnerability Details
The official CVE description states that ncurses prior to version 6.4 20230408, when utilized by a setuid application, allows local users to exploit memory corruption through malformed data in a terminfo database file.
The CVSS score of 7.8 indicates a high severity, and the attributes include a local attack vector, low attack complexity, and low privileges required, with no user interaction necessary. The impacts on confidentiality, integrity, and availability are all classified as high.
Affected systems include all versions of ncurses prior to 6.4. Organizations relying on this software must ensure they are running the latest patched version.
Technical Analysis
The root cause of the vulnerability lies in improper handling of input data, which can lead to memory corruption. The attack vector is local, meaning that an attacker must have access to a system where the vulnerable application is running. The attack complexity is rated as low, indicating that exploiting this vulnerability does not require sophisticated techniques.
The attack requires low privileges, and user interaction is not necessary, making it easier for an attacker to exploit this vulnerability if they have local access. The potential impact includes high confidentiality, integrity, and availability risks, which makes this a serious concern for organizations.
Risk & Impact Analysis
Real-world deployment risk involves the possibility of local users triggering memory corruption, which can lead to unauthorized access to sensitive data or system resources. The blast radius potential is significant, as the vulnerability can affect any setuid application using ncurses, potentially impacting multiple applications across various systems.
Organizations must assess their exposure to this vulnerability, especially if they operate in environments where multiple users have access to the same systems. The urgency is high, necessitating immediate action to mitigate risks before they can be exploited.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions of GNU ncurses prior to version 6.4 are affected by this vulnerability. Organizations should ensure that they upgrade to the patched version to mitigate risks.
Mitigation & Remediation
Organizations are advised to immediately apply patches and updates to their systems running GNU ncurses to version 6.4 or later. If patches are not available, consider implementing workarounds such as restricting access to setuid applications and reviewing terminfo database configurations.
For further guidance, organizations can leverage resources such as continuous penetration testing to identify vulnerabilities and ensure compliance with security standards.
Detection Guidance
To detect exploitation attempts, organizations should monitor logs for unusual access patterns or errors related to terminfo database files. Behavioral anomalies in applications that utilize ncurses may also indicate a potential exploitation attempt.
AppSecure Threat Intelligence Insight
This vulnerability highlights the importance of maintaining secure coding practices and regularly updating software dependencies. It represents a broader trend in software vulnerabilities where local exploitation remains a significant risk.
Organizations should develop a proactive vulnerability management program, ensuring timely updates and patches are applied. For further reading on vulnerability management best practices, refer to vulnerability management programs and the significance of continuous security assessments.
Security teams should also consider the use of penetration testing methodologies to effectively identify and remediate vulnerabilities in their software environments.
Awareness training for developers regarding secure coding practices is also essential to prevent the introduction of similar vulnerabilities in future releases.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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