FTP: uftpd FTP Server PORT Command Handling Stack Buffer Overflow
This signature detects attempts to exploit a known vulnerability against uftpd FTP server. A successful attack can lead to a buffer overflow and arbitrary remote code execution within the context of the service.
Extended Description
In uftpd before 2.11, there is a buffer overflow vulnerability in handle_PORT in ftpcmd.c that is caused by a buffer that is 16 bytes large being filled via sprintf() with user input based on the format specifier string %d.%d.%d.%d. The 16 byte size is correct for valid IPv4 addresses (len('255.255.255.255') == 16), but the format specifier %d allows more than 3 digits. This has been fixed in version 2.11
Affected Products
Troglobit uftpd
References
CVE: CVE-2020-5204
Short Name
FTP:OVERFLOW:UFTPD-PORT-CMD-SBO
Severity
Minor
Recommended
False
Recommended Action
Drop
Category
FTP
Keywords
Buffer CVE-2020-5204 Command FTP Handling Overflow PORT Server Stack uftpd
Release Date
04/09/2020
Supported Platforms
srx-branch-12.3
srx-19.3
srx-branch-19.3
vsrx3bsd-19.2
srx-branch-19.4
vsrx-19.4
mx-12.3
mx-19.4
vmx-19.4
mx-19.3
vsrx3bsd-19.4
srx-19.4
vsrx-12.3
vmx-19.3
vsrx-19.2
srx-12.3
Sigpack Version
3415
False Positive
Unknown
Vendors
Troglobit
CVSS Score
6.5