BlackTreeIndependent security intelligence

Full vulnerability report · 2024

CVE-2023-45237High confidence

Use of a Weak PseudoRandom Number Generator in EDK II Network Package

TianoCore · edk2

5.3MediumCVSS 3.1

Recommended action

Scheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available

Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

1 package state

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu release	Source package	Vendor state	Fixed version	Evidence
Ubuntu 24.04 LTSnoble · standard archive	`edk2`	Under evaluationCanonical reports that the package might be affected and still needs evaluation or fixing.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current

SA24P003 · CSAF 2.0 · revision 2 · finalABB Product Security Incident Response Team (PSIRT)B&R PCs vulnerable to PixieFail attack

10 known affected

The vendor explicitly identifies these products as affected by this CVE.

B&R Industrial Automation GmbH APC4100 <1.09
B&R Industrial Automation GmbH APC910 <=1.25
B&R Industrial Automation GmbH C80 <1.14
B&R Industrial Automation GmbH MPC3100 <1.24
B&R Industrial Automation GmbH PPC1200 <1.14
B&R Industrial Automation GmbH PPC900 <2.16
B&R Industrial Automation GmbH APC2200 <1.35
B&R Industrial Automation GmbH PPC2200 <1.35
B&R Industrial Automation GmbH APC3100 <1.45
B&R Industrial Automation GmbH PPC3100 <1.45

Summary: 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.
Remediation: The problems are corrected in the following product versions: - APC4100 1.09 - APC910 No patch will be released (Please refer to the mitigation measures specified in this advisory). - C80 1.14 - MPC3100 1.24 - PPC1200 1.14 - PPC900 2.16 - APC2200 1.35 - PPC2200 1.35 - APC3100 1.45 - PPC3100 1.45 B&R recommends that customers apply the update at earliest convenience. The process to install updates is described in the user manual. The step to identify the installed product version is described in the user manual.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current

ENISA EUVD identifier

EUVD-2023-49543

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state: Present in the current official mapping
Known exploitation: Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score: Not supplied in the stored EUVD record
Advisory evidence: No linked advisory details stored yet

Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Patch available

What, why and how

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.

What

Why

The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Why

The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.

How

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: a network path → Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface: Network
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-338 ↗
CWE-338: Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). The product uses a Pseudo-Random Number Generator (PRNG) in a security context, but the PRNG's algorithm is not cryptographically strong.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CLowConfidentiality impact: A successful attack can cause a limited loss.INoneIntegrity impact: No direct loss is represented by this metric.ANoneAvailability impact: No direct loss is represented by this metric.
Post-exploitation / living off the land: No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.

NetworkUnauthenticatedCWE-338

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2023-49543Official EUVD mapping

0 linked advisory records.

Official EUVD record

BSI · German · WID-SEC-W-2024-0126EDK2 NetworkPkg IP stack implementation: Mehrere Schwachstellen

Ein Angreifer aus dem angrenzenden Netzwerk oder ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in der EDK2 NetworkPkg IP stack implementation ausnutzen, um beliebigen Programmcode auszuführen, vertrauliche Informationen offenzulegen und einen Denial of Service Zustand auszulösen.

Official advisory

CERT-FR · French · CERTFR-2024-AVI-0679Multiples vulnérabilités dans les produits Intel

d?id=CVE-2023-43747 Référence CVE CVE-2023-45229 https://www.cve.org/CVERecord?id=CVE-2023-45229 Référence CVE CVE-2023-45230 https://www.cve.org/CVERecord?id=CVE-2023-45230 Référence CVE CVE-2023-45231 https://www.cve.org/CVERecord?id=CVE-2023-45231 Référence CVE CVE-2023-45232 https://www.cve.org/CVERecord?id=CVE-2023-45232 Référence CVE CVE-2023-45233 https://www.cve.org/CVERecord?id=CVE-2023-45233 Référence CVE CVE-2023-45234 https://www.cve.org/CVERecord?id=CVE-2023-45234 Référence CVE CVE-2023-45235 https://www.cve.org/CVERecord?id=CVE-2023-45235 Référence CVE CVE-2023-45236 https://www.cve.org/CVERecord?id=CVE-2023-45236 Référence CVE CVE-2023-45237 https://www.cve.org/CVERecord?id=CVE-2023-45237 Référence CVE CVE-2023-48361 https://www.cve.org/CVERecord?id=CVE-2023-48361 Référence CVE CVE-2023-49141 https://www.cve.org/CVERecord?id=CVE-2023-49141 Référence CVE CVE-2023-49144 https://www.cve.org/CVERecord?id=CVE-2023-49144 Référence CVE CVE-2024-21766 https://www.cve.org/CVERecord?id=CVE-2024-21766 Référence CVE CVE-2024-21769 https://www.cve.org/CVERecord?id=CVE-2024-21769 Référence CVE CVE-2024-21784 https://www.cve.org/CVERecord?id=CVE-2024-21784 Référence CVE CVE-2024-21787 https://www.cve.org/CVERecord?id=CVE-2024-21787 Référence CVE CVE-2024-21801 https://www.cve.org/CVERecord?id=

Official advisory

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Patch available
Affected: B&R Industrial Automation GmbH APC4100 <1.09; B&R Industrial Automation GmbH APC910 <=1.25; B&R Industrial Automation GmbH C80 <1.14; B&R Industrial Automation GmbH MPC3100 <1.24; B&R Industrial Automation GmbH PPC1200 <1.14; B&R Industrial Automation GmbH PPC900 <2.16; B&R Industrial Automation GmbH APC2200 <1.35; B&R Industrial Automation GmbH PPC2200 <1.35; B&R Industrial Automation GmbH APC3100 <1.45; B&R Industrial Automation GmbH PPC3100 <1.45
Fixed: B&R Industrial Automation GmbH APC4100 1.09; B&R Industrial Automation GmbH C80 1.14; B&R Industrial Automation GmbH MPC3100 1.24; B&R Industrial Automation GmbH PPC1200 1.14; B&R Industrial Automation GmbH PPC900 2.16; B&R Industrial Automation GmbH APC2200 1.35; B&R Industrial Automation GmbH PPC2200 1.35; B&R Industrial Automation GmbH APC3100 1.45; B&R Industrial Automation GmbH PPC3100 1.45
Action: The problems are corrected in the following product versions: - APC4100 1.09 - APC910 No patch will be released (Please refer to the mitigation measures specified in this advisory). - C80 1.14 - MPC3100 1.24 - PPC1200 1.14 - PPC900 2.16 - APC2200 1.35 - PPC2200 1.35 - APC3100 1.45 - PPC3100 1.45 B&R recommends that customers apply the update at earliest convenience. The process to install updates is described in the user manual. The step to identify the installed product version is described in the user manual.
Workaround: No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.

Evidence and provenance

Published 16 Jan 2024 · Last source change 4 Nov 2025, 18:17 UTC · CWE-338 · Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG)

CVE recordCVE.org · 5.2

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2023-49543

Product sourceVendor CSAF · ABB Product Security Incident Response Team (PSIRT)

Remediation sourceVendor CSAF · ABB Product Security Incident Response Team (PSIRT)

CWE sourceCNA

NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

14 May 2026, 00:30 UTC
Vendor guidanceAuthoritative vendor guidance changed from authoritative remediation link to authoritative remediation link.
Before
authoritative remediation link
After
authoritative remediation link
ABB Product Security Incident Response Team (PSIRT) ↗

2024-01-16CVE published

ENISA EUVD · EUVD-2023-49543↗Vendor CSAF · ABB Product Security Incident Response Team (PSIRT)↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.