Vulnerabilities > CVE-2019-7230 - Use of Externally-Controlled Format String vulnerability in ABB Pb610 Panel Builder 600 Firmware 1.91/2.8.0.367

047910
CVSS 8.8 - HIGH
Attack vector
ADJACENT_NETWORK
Attack complexity
LOW
Privileges required
NONE
Confidentiality impact
HIGH
Integrity impact
HIGH
Availability impact
HIGH
low complexity
abb
CWE-134

Summary

The ABB IDAL FTP server mishandles format strings in a username during the authentication process. Attempting to authenticate with the username %s%p%x%d will crash the server. Sending %08x.AAAA.%08x.%08x will log memory content from the stack.

Common Attack Pattern Enumeration and Classification (CAPEC)

  • Format String Injection
    An attacker includes formatting characters in a string input field on the target application. Most applications assume that users will provide static text and may respond unpredictably to the presence of formatting character. For example, in certain functions of the C programming languages such as printf, the formatting character %s will print the contents of a memory location expecting this location to identify a string and the formatting character %n prints the number of DWORD written in the memory. An attacker can use this to read or write to memory locations or files, or simply to manipulate the value of the resulting text in unexpected ways. Reading or writing memory may result in program crashes and writing memory could result in the execution of arbitrary code if the attacker can write to the program stack.
  • String Format Overflow in syslog()
    This attack targets the format string vulnerabilities in the syslog() function. An attacker would typically inject malicious input in the format string parameter of the syslog function. This is a common problem, and many public vulnerabilities and associated exploits have been posted.

Packetstorm

data sourcehttps://packetstormsecurity.com/files/download/153386/XL-19-004.txt
idPACKETSTORM:153386
last seen2019-06-25
published2019-06-21
reporterEldar Marcussen
sourcehttps://packetstormsecurity.com/files/153386/ABB-IDAL-FTP-Server-Uncontrolled-Format-String.html
titleABB IDAL FTP Server Uncontrolled Format String