Reachable Assertion

Opis

The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary.

While assertion is good for catching logic errors and reducing the chances of reaching more serious vulnerability conditions, it can still lead to a denial of service.

For example, if a server handles multiple simultaneous connections, and an assert() occurs in one single connection that causes all other connections to be dropped, this is a reachable assertion that leads to a denial of service.

Inne nazwy

assertion failure

Skutki

• Availability

  DoS: Crash, Exit, or Restart

  An attacker that can trigger an assert statement can still lead to a denial of service if the relevant code can be triggered by an attacker, and if the scope of the assert() extends beyond the attacker's own session.

Zapobieganie

• Implementation

  Make sensitive open/close operation non reachable by directly user-controlled data (e.g. open/close resources)

• Implementation · Input Validation

  Perform input validation on user data.

Przykłady podatności

• CVE-2024-8768 API server for LLM library can crash when provided an empty prompt, which triggers a reachable assertion
• CVE-2023-49286 Chain: function in web caching proxy does not correctly check a return value (CWE-253) leading to a reachable assertion (CWE-617)
• CVE-2006-6767 FTP server allows remote attackers to cause a denial of service (daemon abort) via crafted commands which trigger an assertion failure.
• CVE-2006-6811 Chat client allows remote attackers to cause a denial of service (crash) via a long message string when connecting to a server, which causes an assertion failure.
• CVE-2006-5779 Product allows remote attackers to cause a denial of service (daemon crash) via LDAP BIND requests with long authcid names, which triggers an assertion failure.
• CVE-2006-4095 Product allows remote attackers to cause a denial of service (crash) via certain queries, which cause an assertion failure.
• CVE-2006-4574 Chain: security monitoring product has an off-by-one error that leads to unexpected length values, triggering an assertion.
• CVE-2004-0270 Anti-virus product has assert error when line length is non-numeric.

Słabość nadrzędna

• CWE-705 Incorrect Control Flow Scoping
• CWE-670 Always-Incorrect Control Flow Implementation

Kiedy powstaje

• Implementation

Dotyczy

Not Language-Specific, C, Java, Rust, Not Technology-Specific