CVE-2022-43501 json
KASAGO TCP/IP stack provided by Zuken Elmic generates ISNs(Initial Sequence Number) for TCP connections from an insufficiently random sourc…
published 2023-02-10 3 y ago modified 2026-06-17 4 mo ago also EUVD-2022-46499
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.6%
- EPSS 0.6% chance of exploitation in 30 days, percentile 47%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- elwsc kasago_ipv4 6.0.1.34
- elwsc kasago_ipv4_light 6.0.1.34
- elwsc kasago_ipv6/v4_dual 6.0.1.34
- elwsc kasago_mobile_ipv6 6.0.1.34
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- total
- Assessed
- 19 mo ago
Exploit prediction
0.56% chance of exploitation in the next 30 days, higher than 47% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| NVD | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
- ZUKEN Elmic Kasago IPv6/v4 Dual
- ZUKEN Elmic Kasago IPv4
- ZUKEN Elmic Kasago IPv4 Light
- ZUKEN Elmic Kasago mobile IPv6
Classification
- Weakness
-
- CWE-330 Use of Insufficiently Random Values
References
-
elwsc.co.jp
/news/6352
vendor-advisory
-
jvn.jp
/en/vu/JVNVU99551468/
third-party-advisory
Sources
- CVE List CVE-2022-43501
- NVD CVE-2022-43501
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