CVE-2023-4641 is categorized as a medium-severity vulnerability affecting RedHat's Shadow-utils. This vulnerability allows an attacker with sufficient access to potentially retrieve passwords from the memory due to a flaw in the input handling of the password change functionality. Specifically, when users are prompted to enter a new password, Shadow-utils requires them to input the password twice. If the second attempt fails, the application does not adequately clear the buffer used to store the first entry.
The significance of this vulnerability is underscored by its CVSS score of 4.7, indicating a medium severity. Organizations should be aware of the potential risk to their systems, as attackers may leverage this flaw to gain unauthorized access to sensitive information, thereby compromising confidentiality.
Currently, there is no known public exploit for CVE-2023-4641, but organizations should remain vigilant as the risk to organizations includes potential data breaches if the vulnerability is exploited. Therefore, organizations should prioritize patching immediately.
Given the potential for exploitation, it is essential for organizations to address this vulnerability in their upcoming patch cycles.
Vulnerability Details
According to the official CVE description, a flaw was found in Shadow-utils. When asking for a new password, Shadow-utils asks the password twice. If the password fails on the second attempt, Shadow-utils fails in cleaning the buffer used to store the first entry. This may allow an attacker with enough access to retrieve the password from the memory.
The vulnerability has been assigned a CVSS score of 4.7, indicating its medium severity. The attack vector is classified as local, meaning an attacker would need local access to exploit this vulnerability. The attack complexity is high, and low privileges are required to exploit the vulnerability. Additionally, there is no user interaction required for this attack.
The affected product includes Shadow-utils and various versions of the RedHat CodeReady Linux Builder. The vulnerability was published on December 27, 2023.
Technical Analysis
The root cause of the vulnerability lies in the improper handling of password input during the change password process. When a user is prompted to enter a new password, Shadow-utils asks for it twice. However, if the second entry fails, the application does not clear the buffer that stored the first entry. This oversight allows an attacker with local access to potentially retrieve the stored password from memory.
As the attack vector is local, an attacker needs to have access to the system where Shadow-utils is running. The complexity of the attack is high, as the attacker must navigate the environment and potentially bypass other security measures in place. Low privileges are required to exploit the vulnerability, meaning that even users with minimal access could pose a risk.
The vulnerability impacts confidentiality as it allows an attacker to access sensitive password information. However, there is no impact on integrity or availability of the system.
Risk & Impact Analysis
The real-world risk associated with CVE-2023-4641 is significant, especially in environments where sensitive data is handled. Organizations using affected versions of Shadow-utils and RedHat systems should consider the blast radius of this vulnerability, which could extend to unauthorized access to user credentials.
With a CVSS score of 4.7, the urgency for remediation is categorized as medium. Organizations should schedule remediation as part of their patch management processes to mitigate potential risks.
Understanding the context of this vulnerability is crucial for security teams. The potential for data breaches and unauthorized access necessitates prompt action to secure the affected systems.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects all versions of Shadow-utils prior to 4.14.0, as well as various versions of RedHat's CodeReady Linux Builder and Enterprise Linux components. Organizations should check their systems for these vulnerable components.
Mitigation & Remediation
To mitigate this vulnerability, organizations should apply the latest patches provided by RedHat for the affected components. It is essential to ensure that systems are updated to versions that include the necessary security fixes. If patches are not immediately available, organizations should implement workarounds such as restricting access to the vulnerable components and increasing monitoring of system activity.
For further assurance, organizations should consider conducting regular security assessments and penetration testing to identify and remediate any additional vulnerabilities that may exist within their systems. This proactive approach will help to maintain a robust security posture.
Organizations should validate remediation effectiveness through penetration testing to identify similar weaknesses.
Detection Guidance
Organizations should monitor logs for any unusual activity related to password changes and check for any unexpected access to the Shadow-utils functionalities. Behavioral anomalies indicating unauthorized attempts to change passwords should be flagged for further investigation.
Additionally, network signatures can be configured to alert security teams to any potential exploitation attempts targeting the vulnerable components.
AppSecure Threat Intelligence Insight
CVE-2023-4641 represents a growing trend in vulnerabilities that stem from inadequate input validation and memory management. This incident highlights the importance of robust coding practices to prevent similar issues in future releases.
Security teams should take this as a reminder to implement thorough code reviews and testing procedures to identify potential weaknesses before they can be exploited in the wild. Regular training for development teams on secure coding practices is also recommended to help mitigate such risks.
For organizations looking to enhance their security posture, consider integrating strategies such as penetration testing methodologies and leveraging vulnerability management programs to stay ahead of potential threats.
Ultimately, the long-term significance of CVE-2023-4641 lies in its potential to serve as a wake-up call for developers and organizations alike, emphasizing the need for a proactive approach to security.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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