Vulnerability · Published Feb 10, 2023 · Assigned by jpcert
CVE-2022-43501
Critical 9.1
In plain English
A critical-severity weak randomness in Kasago IPv4 from ZUKEN Elmic. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 47% of all known vulnerabilities).
Severity (CVSS 3.1)9.1Critical
Exploit odds (30 days)0.6%top 52.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP connections from an insufficiently random source. An attacker may be able to determine the ISN of the current or future TCP connections and either hijack existing ones or spoof future ones.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ZUKEN Elmic | Kasago IPv6/v4 Dual | prior to Ver6.0.1.34 |
| ZUKEN Elmic | Kasago IPv4 | prior to Ver6.0.1.34 |
| ZUKEN Elmic | Kasago IPv4 Light | prior to Ver6.0.1.34 |
| ZUKEN Elmic | Kasago mobile IPv6 | prior to Ver6.0.1.34 |
Weakness: CWE-330 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N