CVE-2010-4345 is a high-severity privilege escalation vulnerability affecting Exim versions 4.72 and earlier. This vulnerability allows local users to gain privileges by leveraging the ability of the exim user account to specify an alternate configuration file with a directive that contains arbitrary commands, such as demonstrated by the spool_directory directive. With a CVSS score of 7.8, organizations must recognize the potential risks associated with this vulnerability.
Risk to organizations includes unauthorized access to sensitive information and the potential for system compromise. Given the nature of this vulnerability, local users can escalate their privileges, leading to significant security breaches. Organizations should prioritize patching immediately to avoid exposure.
As of now, there is confirmed exploitation associated with this vulnerability, with existing exploit code available. Furthermore, the vulnerability has been included in the Known Exploited Vulnerabilities (KEV) catalog, indicating active interest from the threat landscape.
Given the high severity and potential impact, organizations using affected versions of Exim must take immediate action to mitigate risks. This includes applying relevant patches and updates as provided by the vendor.
Vulnerability Details
The official description of CVE-2010-4345 states that Exim 4.72 and earlier allows local users to gain privileges by leveraging the ability of the exim user account to specify an alternate configuration file with a directive that contains arbitrary commands. The vulnerability has been classified as CWE-77, which pertains to command injection vulnerabilities.
The CVSS 3.1 base score for this vulnerability is 7.8, indicating it falls into the high severity category. This score reflects the local attack vector, low attack complexity, low privileges required, and significant impacts on confidentiality, integrity, and availability.
Technical Analysis
The root cause of CVE-2010-4345 lies in the handling of configuration directives within Exim. Local users can exploit this flaw by manipulating configuration files to execute arbitrary commands, leading to privilege escalation.
This vulnerability has a local attack vector, which means that an attacker must have local access to the system to exploit it. The attack complexity is low, requiring minimal effort to successfully execute the attack. The privileges required are also low, allowing users with basic access to exploit the vulnerability.
User interaction is not required for this vulnerability, as the attack can be carried out solely by the local user. The impact on confidentiality, integrity, and availability is high, as successful exploitation can result in complete control over the affected system.
Risk & Impact Analysis
The real-world risk of this vulnerability is substantial, given that local users can exploit it to gain elevated privileges. This presents a significant threat to organizations, particularly those with sensitive data or critical infrastructure relying on Exim. The potential blast radius includes not only the compromised accounts but also any connected systems and data.
The urgency for organizations to address this vulnerability is critical. With a CVSS score of 7.8 and known exploitation in the wild, immediate remediation is necessary to protect against potential breaches.
Exploitation Status
Signal | Status |
|---|---|
Known Exploit | Yes |
Public PoC | Yes |
Actively Exploited | Yes |
Ransomware Use | No |
Affected Versions
The vulnerability affects Exim versions 4.72 and earlier. Additionally, various Linux distributions, including Debian and Ubuntu, are also impacted. Organizations should note that all versions prior to vendor patch are susceptible to this vulnerability.
Mitigation & Remediation
Organizations should apply updates per vendor instructions to mitigate the risk associated with CVE-2010-4345. For those unable to immediately patch, configuration hardening and network controls should be employed to minimize exposure. Regular monitoring is also advised to detect any unauthorized access attempts.
Detection Guidance
Organizations should monitor logs for unusual configurations being loaded by the Exim service. Behavioral anomalies, such as unexpected privilege escalations, should also be investigated. Network signatures indicating attempts to exploit this vulnerability should be established as part of proactive defensive measures.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2010-4345 reflects ongoing vulnerabilities in widely-used software like Exim. This incident highlights the importance of maintaining up-to-date systems and the necessity of timely patching. Security teams can learn from this vulnerability to bolster their defenses through continuous assessment and improvement. For organizations looking to strengthen their security posture, adopting a comprehensive penetration testing strategy can help identify and remediate similar vulnerabilities proactively.
For further information, organizations can refer to our resources on penetration testing to enhance their security measures.
Organizations should also consider implementing continuous security assessments to ensure ongoing protection against evolving threats.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
.webp)