What’s Vulnerable › Vulnerabilities

CVE-2023-45236: Predictable TCP ISNs in EDK II Network Package

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-01-16 · updated 2026-06-17
• Weakness: CWE-200

Description

EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized access and potentially lead to a loss of Confidentiality.

Affected products

• TianoCore edk2: through 202311

References

• http://www.openwall.com/lists/oss-security/2024/01/16/2
• https://github.com/tianocore/edk2/security/advisories/GHSA-hc6x-cw6p-gj7h
• https://security.netapp.com/advisory/ntap-20240307-0011/
• http://www.openwall.com/lists/oss-security/2024/01/16/2
• https://github.com/tianocore/edk2/security/advisories/GHSA-hc6x-cw6p-gj7h
• https://security.netapp.com/advisory/ntap-20240307-0011/
• https://www.kb.cert.org/vuls/id/132380

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