Privilege Escalation in Samba
Summary
CVE-2020-25717: A flaw was found in the way Samba maps domain users to local users. An authenticated attacker could use this flaw to cause possible privilege escalation. Affects samba across 2 version ranges.
< 4.13.17-r0
>= c541b9eac581c74fe694f061dc27a9aa0cd4ca43, < db11778b57610e24324aa4342f89918f66157d71
Fixed in 4.13.17-r0. How to fix ↓
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Background
Samba is an open-source software suite that enables interoperability between Windows and Unix-like systems. It provides file and print services, as well as authentication and authorization mechanisms. Samba allows domain users to be mapped to local users, facilitating seamless integration between different systems. However, a vulnerability has been discovered in Samba that could potentially lead to privilege escalation.
Vulnerability Detail
The vulnerability, identified as CVE-2020-25717, arises from a flaw in the way Samba maps domain users to local users. An authenticated attacker can exploit this flaw to potentially escalate their privileges. This could result in unauthorized access to sensitive information or the ability to perform malicious actions with elevated privileges.
How To Fix
Minimum fixed version
4.13.17-r0
This is the first release that contains the fix.
sudo apk add --upgrade sambaTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
No specific workaround has been mentioned for this vulnerability. It is recommended to apply the available security patches or update to the fixed versions mentioned above.
Conclusion
In conclusion, the privilege escalation vulnerability in Samba (CVE-2020-25717) can potentially allow authenticated attackers to elevate their privileges within the system. To mitigate this risk, it is recommended to update Samba to the fixed versions mentioned above. For further support on vulnerability remediation, please contact DevNack.com.
See every vulnerability recorded for samba →
FAQ
Samba is an open-source software suite that enables interoperability between Windows and Unix-like systems. It provides file and print services, as well as authentication and authorization mechanisms.
Privilege escalation refers to the act of gaining higher levels of access or privileges than originally intended or authorized. In the context of this vulnerability, it means an attacker can elevate their privileges within the Samba system.
An authenticated attacker can exploit the flaw in Samba's domain-to-local user mapping to potentially escalate their privileges. This could allow them to access sensitive information or perform malicious actions with elevated privileges.
Privilege escalation can lead to unauthorized access to sensitive information, unauthorized modification of data, or the ability to perform malicious actions with elevated privileges. It poses a significant security risk to the affected system.
To protect your system, it is crucial to update Samba to the fixed versions mentioned above. Regularly applying security patches and keeping software up to date is essential to mitigate the risk of privilege escalation.
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