CVE-2023-45236
published 2024-01-16CVE-2023-45236: EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number. This vulnerability can be exploited by an attacker to gain unauthorized…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCHINAN
EPSS
0.99%
58.3th percentile
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
23 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | edk2 | < edk2 2024.05-1 (forky) | edk2 2024.05-1 (forky) |
| msrc | azl3_edk2_20230301gitf80f052277c8-37_on_azure_linux_3.0 | — | — |
| msrc | azl3_edk2_20240223gitedc6681206c1-1_on_azure_linux_3.0 | — | — |
| msrc | azl3_qemu_8.2.0-16_on_azure_linux_3.0 | — | — |
| msrc | azure_linux_3.0_arm | — | — |
| msrc | azure_linux_3.0_x64 | — | — |
| msrc | cbl2_edk2_20230301gitf80f052277c8-40_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_edk2_20230301gitf80f052277c8-41_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_hvloader_1.0.1-11_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_hvloader_1.0.1-3_on_cbl_mariner_2.0 | — | — |
| msrc | cbl2_qemu_6.2.0-24_on_cbl_mariner_2.0 | — | — |
| msrc | cbl_mariner_2.0_arm | — | — |
| msrc | cbl_mariner_2.0_x64 | — | — |
| paloalto | pan-os | — | — |
| paloalto | prisma_access | — | — |
| tianocore | edk2 | <= 202311 | — |
| tianocore | edk2 | — | — |
| tianocore | edk2 | >= 0 < 2024.05-1 | 2024.05-1 |
| tianocore | edk2 | >= 0 < 2024.05-1 | 2024.05-1 |
| tianocore | edk2 | >= 0 < 2022.02-3ubuntu0.22.04.5 | 2022.02-3ubuntu0.22.04.5 |
| tianocore | edk2 | >= 0 < 2022.02-3ubuntu0.22.04.4 | 2022.02-3ubuntu0.22.04.4 |
| tianocore | edk2 | >= 0 < 2024.02-2ubuntu0.7 | 2024.02-2ubuntu0.7 |
| tianocore | edk2 | >= 0 < 2024.02-2ubuntu0.6 | 2024.02-2ubuntu0.6 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
osv7.5HIGH
vendor_ubuntu7.4HIGH
vendor_debian5.8MEDIUM
vendor_msrc5.8MEDIUM
vendor_redhat5.8MEDIUM
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Ubuntu
EDK II regression
vendor_ubuntu·2025-11-28·CVSS 5.8
CVE-2023-45236 [MEDIUM] EDK II regression
Title: EDK II regression
Summary: USN-7894-1 introduced a regression in EDK II
USN-7894-1 fixed vulnerabilities in EDK II. The update introduced a
regression in the UEFI network boot. This update reverts the corresponding
fixes for CVE-2023-45236 and CVE-2023-45237 pending further investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that EDK II was susceptible to a predictable TCP Initial
Sequence Number. An attacker could possibly use this issue to gain
unauthorized access. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2023-45236, CVE-2023-45237)
It was discovered that EDK II incorrectly handled S3 sleep. An attacker
could possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 22.04 LTS
Ubuntu
EDK II vulnerabilities
vendor_ubuntu·2025-11-26·CVSS 7.4
CVE-2023-45236 [HIGH] EDK II vulnerabilities
Title: EDK II vulnerabilities
Summary: Several security issues were fixed in EDK II.
It was discovered that EDK II was susceptible to a predictable TCP Initial
Sequence Number. An attacker could possibly use this issue to gain
unauthorized access. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2023-45236, CVE-2023-45237)
It was discovered that EDK II incorrectly handled S3 sleep. An attacker
could possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-1298)
It was discovered that the EDK II PE/COFF loader incorrectly handled
certain memory operations. An attacker could possibly use this issue to
cause a denial of service, obtain sensitive information, or execute
arbitrary code. This issue o
Palo Alto
PAN-SA-2025-0003 Informational: PAN-OS BIOS and Bootloader Security Bulletin
vendor_paloalto·2025-01-23·CVSS 8.2
[HIGH] PAN-SA-2025-0003 Informational: PAN-OS BIOS and Bootloader Security Bulletin
PAN-SA-2025-0003 Informational: PAN-OS BIOS and Bootloader Security Bulletin
Palo Alto Networks is aware of claims of multiple vulnerabilities in hardware device firmware and bootloaders included in our PA-Series (hardware) firewalls. It is not possible for malicious actors or PAN-OS administrators to exploit these vulnerabilities under normal conditions on PAN-OS versions with up-to-date, secured management interfaces deployed according to the best practices guidelines . Users and administrators do not have access to the BIOS firmware or permissions to modify it. An attacker would need to first compromise the system and then get the root Linux privileges necessary to perform these actions before they could exploit these vulnerabilities. These vulnerabilities themselves do not allow an at
Red Hat
edk2: Predictable TCP Initial Sequence Numbers
vendor_redhat·2024-01-16·CVSS 5.8
CVE-2023-45236 [MEDIUM] CWE-200 edk2: Predictable TCP Initial Sequence Numbers
edk2: Predictable TCP Initial Sequence Numbers
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.
A security flaw has been identified in EDK2, the open-source reference implementation of the UEFI specification. This vulnerability enables an unauthorized attacker to potentially disclose sensitive information.
Statement: The identified flaw in the NetworkPkg IP stack within the EDK2, an open-source UEFI implementation, poses a moderate security concern as the vulnerability allows an unauthenticated attacker within the same local network to exploit.
Mitigation: Mitigation for this issue is either not available or the currently a
Microsoft
Predictable TCP ISNs in EDK II Network Package
vendor_msrc·2024-01-09·CVSS 5.8
CVE-2023-45236 [MEDIUM] CWE-338 Predictable TCP ISNs in EDK II Network Package
Predictable TCP ISNs in EDK II Network Package
FAQ: Is Azure Linux the only Microsoft product that includes this open-source library and is therefore potentially affected by this vulnerability?
One of the main benefits to our customers who choose to use the Azure Linux distro is the commitment to keep it up to date with the most recent and most secure versions of the open source libraries with which the distro is composed. Microsoft is committed to transparency in this work which is why we began publishing CSAF/VEX in October 2025. See this blog post for more information. If impact to additional products is identified, we will update the CVE to reflect this.
Mariner: Mariner
TianoCore: TianoCore
Customer Action Required: Yes
Remediation: CBL-Mariner Releases
Reference: https://learn.
Debian
CVE-2023-45236: edk2 - EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Numb...
vendor_debian·2023·CVSS 5.8
CVE-2023-45236 [MEDIUM] CVE-2023-45236: edk2 - EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Numb...
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.
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 2024.05-1)
sid: resolved (fixed in 2024.05-1)
trixie: resolved (fixed in 2024.05-1)
OSV
edk2 regression
osv·2025-11-28·CVSS 7.4
CVE-2023-45236 [HIGH] edk2 regression
edk2 regression
USN-7894-1 fixed vulnerabilities in EDK II. The update introduced a
regression in the UEFI network boot. This update reverts the corresponding
fixes for CVE-2023-45236 and CVE-2023-45237 pending further investigation.
We apologize for the inconvenience.
Original advisory details:
It was discovered that EDK II was susceptible to a predictable TCP Initial
Sequence Number. An attacker could possibly use this issue to gain
unauthorized access. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2023-45236, CVE-2023-45237)
It was discovered that EDK II incorrectly handled S3 sleep. An attacker
could possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-1298)
It was discovered that
OSV
edk2 vulnerabilities
osv·2025-11-26·CVSS 7.4
CVE-2023-45236 [HIGH] edk2 vulnerabilities
edk2 vulnerabilities
It was discovered that EDK II was susceptible to a predictable TCP Initial
Sequence Number. An attacker could possibly use this issue to gain
unauthorized access. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2023-45236, CVE-2023-45237)
It was discovered that EDK II incorrectly handled S3 sleep. An attacker
could possibly use this issue to cause a denial of service. This issue only
affected Ubuntu 22.04 LTS, and Ubuntu 24.04 LTS. (CVE-2024-1298)
It was discovered that the EDK II PE/COFF loader incorrectly handled
certain memory operations. An attacker could possibly use this issue to
cause a denial of service, obtain sensitive information, or execute
arbitrary code. This issue only affected Ubuntu 22.04 LTS, and Ubuntu
24.04 LTS. (CVE-2024-38
GHSA
GHSA-fqc4-ffq5-4r98: EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number
ghsa_unreviewed·2024-01-16
CVE-2023-45236 [MEDIUM] CWE-200 GHSA-fqc4-ffq5-4r98: EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number
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.
OSV
CVE-2023-45236: EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number
osv·2024-01-16·CVSS 7.5
CVE-2023-45236 [HIGH] CVE-2023-45236: EDK2's Network Package is susceptible to a predictable TCP Initial Sequence Number
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.
No detection rules found.
No public exploits indexed.
http://www.openwall.com/lists/oss-security/2024/01/16/2https://github.com/tianocore/edk2/security/advisories/GHSA-hc6x-cw6p-gj7hhttps://security.netapp.com/advisory/ntap-20240307-0011/http://www.openwall.com/lists/oss-security/2024/01/16/2https://github.com/tianocore/edk2/security/advisories/GHSA-hc6x-cw6p-gj7hhttps://security.netapp.com/advisory/ntap-20240307-0011/https://www.kb.cert.org/vuls/id/132380
2024-01-16
Published