Realtek USB FE/1GbE/2.5GbE/5GbE NIC Family - Buffer Overflow

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• realtek rtl8152b firmware10.28 and later · before 10.50
• realtek rtl8152b firmware8.49 and later · up to 8.60 inclusive
• realtek rtl8152b firmware7.42 and later · up to 7.53 inclusive
• realtek rtl8153 firmware7.42 and later · up to 7.53 inclusive
• realtek rtl8153 firmware10.28 and later · before 10.50
• realtek rtl8153 firmware8.49 and later · up to 8.60 inclusive
• realtek rtl8153b firmware8.49 and later · up to 8.60 inclusive
• realtek rtl8153b firmware7.42 and later · up to 7.53 inclusive
• realtek rtl8153b firmware10.28 and later · before 10.50
• realtek rtl8154 firmware7.42 and later · up to 7.53 inclusive
• realtek rtl8154 firmware8.49 and later · up to 8.60 inclusive
• realtek rtl8154 firmware10.28 and later · before 10.50
• realtek rtl8154b firmware7.42 and later · up to 7.53 inclusive
• realtek rtl8154b firmware8.49 and later · up to 8.60 inclusive
• realtek rtl8154b firmware10.28 and later · before 10.50
• realtek rtl8156 firmware10.28 and later · before 10.50
• realtek rtl8156 firmware7.42 and later · up to 7.53 inclusive
• realtek rtl8156 firmware8.49 and later · up to 8.60 inclusive
• realtek rtl8156b firmware7.42 and later · up to 7.53 inclusive
• realtek rtl8156b firmware10.28 and later · before 10.50

Versions reported by the vendor

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

• Realtek USB FE/1GbE/2.5GbE/5GbE NIC Family

  • 10.28 and later · up to and including 10.39affected
  • 8.49 and later · up to and including 8.60affected
  • 7.42 and later · up to and including 7.53affected

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.