VulnerabilityModified
CVE-2022-43501
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.
CRITICAL 9.1EPSS 0.56%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.56%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
- EPSS
- 0.56% probability · 45th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-330
- Affected
- elwsc/kasago ipv4 · elwsc/kasago ipv4 light · elwsc/kasago ipv6\/v4 dual · elwsc/kasago mobile ipv6
- Source
- vultures@jpcert.or.jp
References
- https://jvn.jp/en/vu/JVNVU99551468/Third Party Advisory
- https://www.elwsc.co.jp/news/6352Vendor Advisory
- https://jvn.jp/en/vu/JVNVU99551468/Third Party Advisory
- https://www.elwsc.co.jp/news/6352Vendor Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.