Wind River VxWorks up to 7 TCP Initial Sequence Number input validation

CVSS Meta Temp Score
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CTI Interest Score
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5.4$0-$5k0.00

Summaryinfo

A vulnerability has been found in Wind River VxWorks up to 5.5.0/6.7.1.0/6.8.2/6.9.4.3/7 and classified as critical. Affected by this issue is some unknown functionality of the component TCP Initial Sequence Number Handler. This manipulation causes input validation. This vulnerability is handled as CVE-2015-3963. There is not any exploit available. The affected component should be upgraded.

Detailsinfo

A vulnerability has been found in Wind River VxWorks up to 5.5.0/6.7.1.0/6.8.2/6.9.4.3/7 and classified as critical. Affected by this vulnerability is an unknown part of the component TCP Initial Sequence Number Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

Wind River VxWorks before 5.5.1, 6.5.x through 6.7.x before 6.7.1.1, 6.8.x before 6.8.3, 6.9.x before 6.9.4.4, and 7.x before 7 ipnet_coreip 1.2.2.0, as used on Schneider Electric SAGE RTU devices before J2 and other devices, does not properly generate TCP initial sequence number (ISN) values, which makes it easier for remote attackers to spoof TCP sessions by predicting an ISN value.

The weakness was released 08/04/2015 (Website). It is possible to read the advisory at ics-cert.us-cert.gov. This vulnerability is known as CVE-2015-3963 since 05/12/2015. The exploitation appears to be difficult. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 84399 (Wind River VxWorks TCP Predictability Vulnerability), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Misc..

Upgrading to version 5.5.1, 6.7.1.1, 6.8.3 or 6.9.4.4 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (84399) and SecurityFocus (BID 75302†). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.6
VulDB Meta Temp Score: 5.4

VulDB Base Score: 5.6
VulDB Temp Score: 5.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
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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Nessus ID: 84399
Nessus Name: Wind River VxWorks TCP Predictability Vulnerability
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍
Upgrade: VxWorks 5.5.1/6.7.1.1/6.8.3/6.9.4.4

Timelineinfo

05/12/2015 🔍
06/18/2015 +37 days 🔍
08/03/2015 +46 days 🔍
08/04/2015 +1 days 🔍
08/04/2015 +0 days 🔍
06/07/2022 +2499 days 🔍

Sourcesinfo

Advisory: ics-cert.us-cert.gov
Status: Not defined
Confirmation: 🔍

CVE: CVE-2015-3963 (🔍)
GCVE (CVE): GCVE-0-2015-3963
GCVE (VulDB): GCVE-100-76891
SecurityFocus: 75302 - Wind River VxWorks CVE-2015-3963 Predictable TCP Initial Sequence Security Bypass Vulnerability
SecurityTracker: 1032730

Entryinfo

Created: 08/04/2015 18:21
Updated: 06/07/2022 10:50
Changes: 08/04/2015 18:21 (46), 09/04/2017 09:22 (11), 06/07/2022 10:44 (3), 06/07/2022 10:50 (1)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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