cve.bz

CVE-2023-0286

7.4 highEPSS 69%

There is a type confusion vulnerability relating to X.400 address processing inside an X.509 GeneralName. X.400 addresses were parsed as an ASN1_STRING but the public structure definition for GENERAL_NAME incorrectly specified the type of the x400Address field as ASN1_TYPE. This field is subsequently interpreted by the OpenSSL function GENERAL_NAME_cmp as an ASN1_TYPE rather than an ASN1_STRING. When CRL checking is enabled (i.e. the application sets the X509_V_FLAG_CRL_CHECK flag), this vulnerability may allow an attacker to pass arbitrary pointers to a memcmp call, enabling them to read memory contents or enact a denial of service. In most cases, the attack requires the attacker to provide both the certificate chain and CRL, neither of which need to have a valid signature. If the attacker only controls one of these inputs, the other input must already contain an X.400 address as a CRL distribution point, which is uncommon. As such, this vulnerability is most likely to only affect applications which have implemented their own functionality for retrieving CRLs over a network.

CVSS 3.1
7.4CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H
EPSS
69% chance of exploitation in the next 30 days; higher than 99% of CVEs (scores of 2026-10-25)
CWE
CWE-843
Published
Modified
Record from
the NVD, synced

Affected

Packages (OSV)

AdvisoryEcosystemPackageAffectedFixed in
GHSA-x4qr-2fvf-3mr5PyPIcryptography>=0.8.1 <39.0.139.0.1
GHSA-x4qr-2fvf-3mr5crates.ioopenssl-src<111.25.0111.25.0
GHSA-x4qr-2fvf-3mr5crates.ioopenssl-src>=300.0.0 <300.0.12300.0.12
PYSEC-2026-800PyPIcryptography>=0.8.1 <39.0.139.0.1
RUSTSEC-2023-0006crates.ioopenssl-src>=0.0.0-0 <111.25.0
>=300.0.0 <300.0.12		111.25.0, 300.0.12

References

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