Vulnerabilities > CVE-2020-12651 - Integer Overflow or Wraparound vulnerability in Vandyke Securecrt
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
HIGH Integrity impact
HIGH Availability impact
HIGH Summary
SecureCRT before 8.7.2 allows remote attackers to execute arbitrary code via an Integer Overflow and a Buffer Overflow because a banner can trigger a line number to CSI functions that exceeds INT_MAX.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| Application | 16 | |
| OS | 2 | |
| OS | 1 | |
| OS | 1 |
Common Weakness Enumeration (CWE)
Common Attack Pattern Enumeration and Classification (CAPEC)
- Forced Integer Overflow This attack forces an integer variable to go out of range. The integer variable is often used as an offset such as size of memory allocation or similarly. The attacker would typically control the value of such variable and try to get it out of range. For instance the integer in question is incremented past the maximum possible value, it may wrap to become a very small, or negative number, therefore providing a very incorrect value which can lead to unexpected behavior. At worst the attacker can execute arbitrary code.
Nessus
| NASL family | Windows |
| NASL id | VANDYKE_SOFTWARE_SECURECRT_8_7_2.NASL |
| description | The version of VanDyke Software SecureCRT installed on the remote Windows host is prior to 8.7.2. It is, therefore, affected by a memory corruption vulnerability. An attacker may be able to exploit this vulnerability, via a malformed response, to corrupt memory in the terminal process and execute arbitrary code. Note that Nessus has not tested for these issues but has instead relied only on the application |
| last seen | 2020-06-05 |
| modified | 2020-05-29 |
| plugin id | 136949 |
| published | 2020-05-29 |
| reporter | This script is Copyright (C) 2020 and is owned by Tenable, Inc. or an Affiliate thereof. |
| source | https://www.tenable.com/plugins/nessus/136949 |
| title | VanDyke Software SecureCRT < 8.7.2 Memory Corruption Vulnerability |
Packetstorm
| data source | https://packetstormsecurity.com/files/download/157718/GS20200515145103.txt |
| id | PACKETSTORM:157718 |
| last seen | 2020-05-17 |
| published | 2020-05-15 |
| reporter | Tavis Ormandy |
| source | https://packetstormsecurity.com/files/157718/SecureCRT-Memory-Corruption.html |
| title | SecureCRT Memory Corruption |