Low-level invalid GF(2^m) parameters lead to OOB memory access (CVE-2024-9143)
Published Last modified Sources: Siemens ProductCERT, BSI, Ubuntu, CVE.org, Msrc Update Guide, EUVD
What is affected, what to do
Issue summary: Use of the low-level GF(2^m) elliptic curve APIs with untrusted explicit values for the field polynomial can lead to out-of-bounds memory reads or writes. Impact summary: Out of bound memory writes can lead to an application crash or even a possibility of a remote code execution, however, in all the protocols involving Elliptic Curve Cryptography that we're aware of, either only "named curves" are supported, or, if explicit curve parameters are supported, they specify an X9.62 encoding of binary (GF(2^m)) curves that can't represent problematic input values.
Update OpenSSL to version 3.3.3, OpenSSL to version 3.2.4, OpenSSL to version 3.1.8.
- Affected
- OpenSSL
lt 3.3.0..3.3.3 - OpenSSL
lt 3.2.0..3.2.4 - OpenSSL
lt 3.1.0..3.1.8 - OpenSSL
lt 3.0.0..3.0.16 - OpenSSL
lt 1.1.1..1.1.1zb - OpenSSL
lt 1.0.2..1.0.2zl
- OpenSSL
- Fixed in
- OpenSSL
3.3.3 - OpenSSL
3.2.4 - OpenSSL
3.1.8 - OpenSSL
3.0.16 - OpenSSL
1.1.1zb - OpenSSL
1.0.2zl
- OpenSSL
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Metrics
4.3
Priority
XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.
Source: NVD, CVSS v3
4.3
CVSS v3
Severity Medium on the scale from 0 to 10.
Source: Siemens ProductCERT, BSI, Ubuntu, CVE.org, Msrc Update Guide, EUVD
5.8 %
EPSS score
Moderate — model estimates 1-10% exploitation likelihood.
Source: FIRST EPSS, percentile 93.2
Show all metrics
- Severity
- Medium
Priority (0–325)
The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?
Read in glossary- 97.48 Methodology
Exploit maturity
An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.
Read in glossary- no public PoC known
XIEM Effective CVSS
XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.
Read in glossary- 4.3 Methodology
CVSS v3
CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.
Read in glossary- 4.3
EPSS score
The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.
Read in glossary- 5.8 %
- Moderate — model estimates 1-10% exploitation likelihood.
EPSS percentile
The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.
Read in glossary- 93.2
- Critical — this CVE ranks in the top fifth of all CVEs scored today (rank ≥ 80%).
KEV status
The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.
Read in glossary- —
- Published
- CISA assessment (SSVC)
- Exploitation: none known · not automatable · Technical impact: partial
- Source: CISA Vulnrichment, as of 16 October 2024
CWE
CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.
Read in glossary- CWE-125, CWE-787
Detection rules
No NEOSEC detection rule is available for this vulnerability yet.
Classification under NIS2 and CRA
Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.
NIS2
NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.
Read in glossary- Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
CRA
The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.
Read in glossary- From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
ISO/IEC 27001
ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.
Read in glossary- Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.
Description
Issue summary: Use of the low-level GF(2^m) elliptic curve APIs with untrusted explicit values for the field polynomial can lead to out-of-bounds memory reads or writes. Impact summary: Out of bound memory writes can lead to an application crash or even a possibility of a remote code execution, however, in all the protocols involving Elliptic Curve Cryptography that we're aware of, either only "named curves" are supported, or, if explicit curve parameters are supported, they specify an X9.62 encoding of binary (GF(2^m)) curves that can't represent problematic input values. Thus the likelihood of existence of a vulnerable application is low. In particular, the X9.62 encoding is used for ECC keys in X.509 certificates, so problematic inputs cannot occur in the context of processing X.509 certificates. Any problematic use-cases would have to be using an "exotic" curve encoding. The affected APIs include: EC_GROUP_new_curve_GF2m(), EC_GROUP_new_from_params(), and various supporting BN_GF2m_*() functions. Applications working with "exotic" explicit binary (GF(2^m)) curve parameters, that make it possible to represent invalid field polynomials with a zero constant term, via the above or similar APIs, may terminate abruptly as a result of reading or writing outside of array bounds. Remote code execution cannot easily be ruled out. The FIPS modules in 3.3, 3.2, 3.1 and 3.0 are not affected by this issue.
Source: siemens_advisory, BSI CSAF, BSI WID Portal, Ubuntu Security Notices, NVD (NIST), Microsoft Security Update Guide, CVE.org (MITRE), cvelistv5, ENISA EUVD
Affected products
The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.
| Affected versions | Fixed in | ||
|---|---|---|---|
| OpenSSL | OpenSSL |
|
|
| Dell | PowerProtect Data Domain OS |
|
|
| Oracle | Commerce |
|
|
| Oracle | Communications |
|
|
Vendors and products
Affected operating systems
| Linux | ubuntu | openssl | focal |
| Linux | ubuntu | openssl | jammy |
| Linux | ubuntu | openssl | noble |
Weakness classes (CWE)
CWE-125Out-of-bounds Read
Base
The product reads data past the end, or before the beginning, of the intended buffer.
Entry at MITRE CWE-125CWE-787Out-of-bounds Write
Base
The product writes data past the end, or before the beginning, of the intended buffer.
Entry at MITRE CWE-787
References & sources
- openssl-library.orgOpenSSL AdvisoryVendor advisory
- github.com3.3.3 git commitPatch
- github.com3.2.4 git commitPatch
- github.com3.1.8 git commitPatch
- github.com3.0.16 git commitPatch
- github.openssl.org1.1.1zb git commitPatch
- github.openssl.org1.0.2zl git commitPatch
- openwall.comlists/oss-security/2024/10/16/1
- openwall.comlists/oss-security/2024/10/23/1
- openwall.comlists/oss-security/2024/10/24/1
- security.netapp.comadvisory/ntap-20241101-0001
- lists.debian.orgdebian-lts-announce/2024/11/msg00000.html
- lists.debian.orgdebian-lts-announce/2024/10/msg00033.html
- Siemens ProductCERTproductcert/html/ssa-398330.html
- Siemens ProductCERTproductcert/html/ssa-265688.html
- Siemens ProductCERTproductcert/html/ssa-769027.html
- Siemens ProductCERTproductcert/html/ssa-277137.html
Changes to this CVE
Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).
Record modifiedopenssl.org
New references:- https://github.com/openssl/openssl/commit/72ae83ad214d2eef262461365a1975707f862712
- https://github.com/openssl/openssl/commit/bc7e04d7c8d509fb78fc0e285aa948fb0da04700
- https://github.com/openssl/openssl/commit/c0d3e4d32d2805f49bec30547f225bc4d092e1f4
- https://github.com/openssl/openssl/commit/fdf6723362ca51bd883295efe206cb5b1cfa5154
and 3 more references
Show 14 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —https://github.com/openssl/openssl/commit/72ae83ad214d2eef262461365a1975707f862712Reference added —https://github.com/openssl/openssl/commit/bc7e04d7c8d509fb78fc0e285aa948fb0da04700Reference added —https://github.com/openssl/openssl/commit/c0d3e4d32d2805f49bec30547f225bc4d092e1f4Reference added —https://github.com/openssl/openssl/commit/fdf6723362ca51bd883295efe206cb5b1cfa5154Reference added —https://github.openssl.org/openssl/extended-releases/commit/8efc0cbaa8ebba8e116f7b81a876a4123594d86aReference added —https://github.openssl.org/openssl/extended-releases/commit/9d576994cec2b7aa37a91740ea7e680810957e41Reference added —https://openssl-library.org/news/secadv/20241016.txtReference removed https://github.com/openssl/openssl/commit/72ae83ad214d2eef262461365a1975707f862712—Reference removed https://github.com/openssl/openssl/commit/bc7e04d7c8d509fb78fc0e285aa948fb0da04700—Reference removed https://github.com/openssl/openssl/commit/c0d3e4d32d2805f49bec30547f225bc4d092e1f4—Reference removed https://github.com/openssl/openssl/commit/fdf6723362ca51bd883295efe206cb5b1cfa5154—Reference removed https://github.openssl.org/openssl/extended-releases/commit/8efc0cbaa8ebba8e116f7b81a876a4123594d86a—Reference removed https://github.openssl.org/openssl/extended-releases/commit/9d576994cec2b7aa37a91740ea7e680810957e41—Reference removed https://openssl-library.org/news/secadv/20241016.txt—Source identifier: openssl-security@openssl.org
Record modifiedCVE Program
Show 12 original changes
Individual changes of this event as published by NVD Type Action Before After Reference added —http://www.openwall.com/lists/oss-security/2024/10/16/1Reference added —http://www.openwall.com/lists/oss-security/2024/10/23/1Reference added —http://www.openwall.com/lists/oss-security/2024/10/24/1Reference added —https://lists.debian.org/debian-lts-announce/2024/10/msg00033.htmlReference added —https://lists.debian.org/debian-lts-announce/2024/11/msg00000.htmlReference added —https://security.netapp.com/advisory/ntap-20241101-0001/Reference removed http://www.openwall.com/lists/oss-security/2024/10/16/1—Reference removed http://www.openwall.com/lists/oss-security/2024/10/23/1—Reference removed http://www.openwall.com/lists/oss-security/2024/10/24/1—Reference removed https://lists.debian.org/debian-lts-announce/2024/10/msg00033.html—Reference removed https://lists.debian.org/debian-lts-announce/2024/11/msg00000.html—Reference removed https://security.netapp.com/advisory/ntap-20241101-0001/—Source identifier: af854a3a-2127-422b-91ae-364da2661108
Record modifiedSiemens ADP
Show 9 original changes
Individual changes of this event as published by NVD Type Action Before After Affected versions (publisher) added —Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2024/9xxx/CVE-2024-9143.json">CVE-2024-9143</a>Reference added —https://cert-portal.siemens.com/productcert/html/ssa-265688.htmlReference added —https://cert-portal.siemens.com/productcert/html/ssa-277137.htmlReference added —https://cert-portal.siemens.com/productcert/html/ssa-398330.htmlReference added —https://cert-portal.siemens.com/productcert/html/ssa-769027.htmlReference removed https://cert-portal.siemens.com/productcert/html/ssa-265688.html—Reference removed https://cert-portal.siemens.com/productcert/html/ssa-277137.html—Reference removed https://cert-portal.siemens.com/productcert/html/ssa-398330.html—Reference removed https://cert-portal.siemens.com/productcert/html/ssa-769027.html—Source identifier: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e
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<a href="https://intel.neosec.eu/en/cve/CVE-2024-9143"><img src="https://intel.neosec.eu/badge/cve/CVE-2024-9143.svg?lang=en" alt="CVE-2024-9143 – NEOSEC Intel" height="20"></a>