CVE-2025-67896
Description
A flaw was found in Exim. A remote attacker could exploit a heap corruption vulnerability, which is a type of memory error, to potentially cause the system to crash (Denial of Service) or execute unauthorized code. Further details regarding the exploitation method are expected to be released at a later date.
Statement
This vulnerability is rated Moderate as it allows a remote attacker to exploit a heap corruption flaw. This could lead to a denial of service or arbitrary code execution. This issue impacts Exim in Community Projects, including EPEL and Fedora.
Understanding the Weakness (CWE)
Confidentiality
Technical Impact: Read Memory
If the expired pointer is used in a read operation, an attacker might be able to control data read in by the application.
Availability
Technical Impact: DoS: Crash, Exit, or Restart
If the expired pointer references a memory location that is not accessible to the product, or points to a location that is "malformed" (such as NULL) or larger than expected by a read or write operation, then a crash may occur.
Integrity,Confidentiality,Availability
Technical Impact: Execute Unauthorized Code or Commands
If the expired pointer is used in a function call, or points to unexpected data in a write operation, then code execution may be possible.
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