A heap overflow vulnerability in the ifsbreakup function of BusyBox versions 1.00 through 1.38.0 allows unauthenticated attackers to cause a Denial of Service via crafted input.

This vulnerability is an out-of-bounds read and heap overflow flaw located in the ifsbreakup function of the shell component, requiring no user interaction or authentication to trigger.

A successful exploit against vulnerable BusyBox instances results in a Denial of Service, which can disrupt critical embedded systems and network appliances. This operational outage can lead to significant service degradation and downtime. The CVSS score of 7.5 reflects the high potential for service disruption from network-based attacks.

Immediate Action: Update BusyBox to the latest available version once a vendor patch is released, or apply vendor-supplied patches to resolve the heap overflow vulnerability.

Proactive Monitoring: Monitor system resource utilization, memory consumption, and unexpected process crashes that might indicate exploitation attempts against the shell environment.

Compensating Controls: Restrict untrusted input streams and implement strict input validation at application boundaries to prevent crafted payloads from reaching the affected shell functions.

Public Exploit Available: false

Security teams managing systems running BusyBox should evaluate their inventory for versions 1.00 through 1.38.0. Administrators must monitor developer channels for patch availability and apply updates promptly to eliminate the risk of service disruption.