Information Disclosure in NetBSD TCP Sequence Number Generation
CVE-2021-45488

7.5HIGH

Key Information:

Vendor

Netbsd

Status
Netbsd
Vendor
CVE Published:
25 December 2021

What is CVE-2021-45488?

The vulnerability in NetBSD affects its TCP initial sequence number (ISN) generation mechanism, which may inadvertently disclose sensitive information. Through this weakness, an attacker can potentially predict TCP sequence numbers, enabling session hijacking or man-in-the-middle attacks. The issue is present in NetBSD versions up to 9.2, necessitating prompt updates and security measures to mitigate risks associated with unsuccessful implementation of secure sequence number generation. For detailed security advisories, refer to the related documentation provided by NetBSD.

References

https://arxiv.org/pdf/2112.09604.pdf
x_refsource_MISC
http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetB...
x_refsource_MISC

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.