Critical Path Variable Vulnerability in isc-dhcp Package
Summary
CVE-2012-2248: An issue was discovered in dhclient 4.3.1-6 due to an embedded path variable. Affects isc-dhcp versions < 4.2.4-3. Fixed in 4.2.4-3. How to fix ↓
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Background
The isc-dhcp package is a widely used implementation of the Dynamic Host Configuration Protocol (DHCP), which enables network devices to obtain configuration information from a server. It is critical for managing IP address allocation and network settings in various environments, including enterprise networks and home routers. The package is known for its reliability and extensive feature set, but it has been identified to have a vulnerability due to an embedded path variable that could be exploited.
Vulnerability Detail
CVE-2012-2248 is a vulnerability discovered in dhclient version 4.3.1-6 of the isc-dhcp package. The issue arises from an embedded path variable that can be manipulated by an attacker. This vulnerability could allow unauthorized access to sensitive information or enable an attacker to execute arbitrary commands, potentially compromising the integrity and confidentiality of the system. The CVSS score for this vulnerability is 8.1, indicating a high severity level.
How To Fix
Minimum fixed version
4.2.4-3
This is the first release that contains the fix.
sudo apt-get install --only-upgrade isc-dhcpTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate upgrading is not possible, users can mitigate the risk by restricting access to the dhclient configuration files and ensuring that only trusted users have the ability to modify them. Additionally, monitoring network traffic for unusual activity may help identify potential exploitation attempts.
Conclusion
The isc-dhcp package has a critical vulnerability (CVE-2012-2248) that can be exploited due to an embedded path variable. Users are strongly advised to upgrade to the fixed version to protect their systems from potential attacks. Monitoring tools like Vulert can assist in identifying vulnerabilities in real-time.
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FAQ
CVE-2012-2248 is a vulnerability in the isc-dhcp package that involves an embedded path variable, which can be exploited by attackers.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability without any signup.
The vulnerability could lead to unauthorized access to sensitive information or allow attackers to execute arbitrary commands on the affected system.
It is recommended to upgrade to version 4.2.4-3 or later to mitigate the vulnerability.
Yes, Vulert can monitor and alert you in real-time for open-source vulnerabilities in your software using just a manifest file like package-lock.json.
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