Zuken Elmic KASAGO TCP/IP Stack Initial Sequence Number random values

CVSS Meta Temp Score
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CTI Interest Score
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7.3$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Zuken Elmic KASAGO TCPIP Stack. This affects an unknown part of the component Initial Sequence Number Handler. The manipulation leads to random values. This vulnerability is documented as CVE-2022-43501. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Zuken Elmic KASAGO TCPIP Stack (version now known) and classified as problematic. This issue affects some unknown processing of the component Initial Sequence Number Handler. The manipulation with an unknown input leads to a random values vulnerability. Using CWE to declare the problem leads to CWE-330. The product uses insufficiently random numbers or values in a security context that depends on unpredictable numbers. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The weakness was released 02/10/2023. The advisory is shared at jvn.jp. The identification of this vulnerability is CVE-2022-43501 since 12/09/2022. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1600.001 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Vendor

Name

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 7.3

VulDB Base Score: 5.6
VulDB Temp Score: 5.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 9.1
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Random values
CWE: CWE-330 / CWE-310
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

12/09/2022 🔍
02/10/2023 +63 days 🔍
02/10/2023 +0 days 🔍
03/24/2025 +773 days 🔍

Sourcesinfo

Advisory: jvn.jp
Status: Not defined
Confirmation: 🔍

CVE: CVE-2022-43501 (🔍)
GCVE (CVE): GCVE-0-2022-43501
GCVE (VulDB): GCVE-100-220541

Entryinfo

Created: 02/10/2023 07:34
Updated: 03/24/2025 19:41
Changes: 02/10/2023 07:34 (38), 03/09/2023 13:33 (11), 03/24/2025 19:41 (16)
Complete: 🔍
Cache ID: 216::103

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