CVE-2019-25018 : Security Advisory and Response
Learn about CVE-2019-25018, a vulnerability in MIT krb5-appl allowing malicious servers to alter directory permissions. Find mitigation steps and prevention measures here.
MIT krb5-appl through version 1.0.3 allows malicious servers to bypass access restrictions in the rcp client, potentially altering directory permissions on the client's side.
Understanding CVE-2019-25018
This CVE involves a vulnerability in the rcp client in MIT krb5-appl up to version 1.0.3, enabling malicious servers to manipulate directory permissions on the client's system.
What is CVE-2019-25018?
The vulnerability in the rcp client of MIT krb5-appl allows unauthorized access to circumvent intended restrictions by using specific filenames, leading to unauthorized modification of directory permissions.
The Impact of CVE-2019-25018
Exploitation of this vulnerability can result in unauthorized changes to directory permissions on the client's system, potentially compromising the security and integrity of the affected system.
Technical Details of CVE-2019-25018
MIT krb5-appl through version 1.0.3 is susceptible to this vulnerability, allowing for the manipulation of directory permissions by malicious servers.
Vulnerability Description
The rcp client in MIT krb5-appl up to version 1.0.3 can be exploited by malicious servers to bypass access restrictions, similar to previous CVEs, resulting in unauthorized changes to directory permissions.
Affected Systems and Versions
- MIT krb5-appl up to version 1.0.3
Exploitation Mechanism
Malicious servers can exploit this vulnerability by using filenames such as "." or leaving the filename field empty, enabling them to alter directory permissions on the client's side.
Mitigation and Prevention
To address CVE-2019-25018, immediate actions and long-term security practices are recommended.
Immediate Steps to Take
- Apply security patches or updates provided by the vendor promptly.
- Monitor and restrict network access to mitigate potential exploitation.
- Implement strong access controls and authentication mechanisms.
Long-Term Security Practices
- Regularly update and patch software to address known vulnerabilities.
- Conduct security assessments and audits to identify and remediate weaknesses.
Patching and Updates
- Ensure that MIT krb5-appl is updated to a version beyond 1.0.3 to mitigate the vulnerability.