Vulnerabilities > CVE-2020-28895 - Integer Overflow or Wraparound vulnerability in multiple products
Attack vector
NETWORK Attack complexity
LOW Privileges required
NONE Confidentiality impact
LOW Integrity impact
LOW Availability impact
LOW Summary
In Wind River VxWorks, memory allocator has a possible overflow in calculating the memory block's size to be allocated by calloc(). As a result, the actual memory allocated is smaller than the buffer size specified by the arguments, leading to memory corruption.
Vulnerable Configurations
| Part | Description | Count |
|---|---|---|
| OS | 10 | |
| Application | 6 |
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.
References
- https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2020-28895
- https://support2.windriver.com/index.php?page=cve&on=view&id=CVE-2020-28895
- https://support2.windriver.com/index.php?page=defects&on=view&id=V7LIBC-1327
- https://support2.windriver.com/index.php?page=defects&on=view&id=V7LIBC-1327
- https://www.oracle.com/security-alerts/cpuapr2022.html
- https://www.oracle.com/security-alerts/cpuapr2022.html