CVE-2021-45488

HIGH
Published Dec 25, 20214y ago · Modified Jun 17, 20262w ago
7.5 CVSS 3.1
High
Find Similar
Published Dec 25, 2021 4y ago
Last Modified Jun 17, 2026 2w ago

Description

In NetBSD through 9.2, there is an information leak in the TCP ISN (ISS) generation algorithm.

CVSS Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

No active exploitation signals — not in CISA KEV and no EPSS score yet.

Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-330

Affected Products 1

VendorProductVersionRange
netbsdnetbsd* ≤9.2

References 2

  • ftp.netbsd.org http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2021-001.txt.asc
    PatchVendor Advisory
  • arxiv.org https://arxiv.org/pdf/2112.09604.pdf
    Technical DescriptionThird Party Advisory

Remediation

  • ftp.netbsd.org http://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2021-001.txt.asc
    PatchVendor Advisory