Vigie VulnDBEuropean-hosted Vulnerability DB

CVE-2024-9143

Low-level invalid GF(2^m) parameters lead to OOB memory access

At a glance

Severity
MEDIUM 4.3
EPSS
EPSS 5.84 % · percentile 93 (2026-10-27)
State
PUBLISHED
Published
Updated
Assigner
openssl
NVD status
Deferred

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.

Scores

VersionScoreVectorScored by
CVSS 3.1MEDIUM 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NCISA-ADP
CVSS 3.1MEDIUM 4.3CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:NNVD · 134c704f-9b21-4f2e-91b3-4a467353bcc0 (Secondary)

Weaknesses (CWE)

European references

CERT-FR advisories

Affected products

ProductVersions
OpenSSL · OpenSSLaffected 3.3.0 < 3.3.3 ; affected 3.2.0 < 3.2.4 ; affected 3.1.0 < 3.1.8 ; affected 3.0.0 < 3.0.16 ; affected 1.1.1 < 1.1.1zb ; affected 1.0.2 < 1.0.2zl

References

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD