Prime95 29.4b8 Local Buffer Overflow via SEH

Versions reported by the vendor

Affected version ranges reported by the assigning authority (VulnCheck). Independent of NVD's CPE analysis and usually ahead of it.

• Mersenne Prime95

  • 29.4b8affected

Other highest-scoring records for the same primary product.

• CVE-2022-30055Prime95 30.7 build 9 suffers from a Buffer Overflow vulnerability that could lead to Remote Code Execution.
  40Plan
• CVE-2018-25293Prime95 29.4b7 Denial of Service via Proxy Password Field
  27Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Root cause

When data is copied, the source length is not compared with the size of the destination buffer. Excess data overwrites adjacent memory.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1char buf[256];2memcpy(buf, pkt->data, pkt->len);

1char buf[256];2if (pkt->len > sizeof(buf)) {3  return -EINVAL;4}5memcpy(buf, pkt->data, pkt->len);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.