CWE-127 - Buffer Under-read
CWE-127
- Abstraction:
- Variant
- Structure:
- Simple
- Status:
- Draft
- Weakness Name
Buffer Under-read
- Description
The product reads from a buffer using buffer access mechanisms such as indexes or pointers that reference memory locations prior to the targeted buffer.
This typically occurs when the pointer or its index is decremented to a position before the buffer, when pointer arithmetic results in a position before the beginning of the valid memory location, or when a negative index is used. This may result in exposure of sensitive information or possibly a crash.
- Common Consequences
Scope: Confidentiality
Impact: Read Memory
Scope: Confidentiality
Impact: Bypass Protection Mechanism
Notes: By reading out-of-bounds memory, an attacker might be able to get secret values, such as memory addresses, which can be bypass protection mechanisms such as ASLR in order to improve the reliability and likelihood of exploiting a separate weakness to achieve code execution instead of just denial of service.
- Related Weaknesses
- Release Date:
- 2006-07-19
- Latest Modification Date:
- 2023-10-26
Free security scan for your website