CVE Vulnerabilities

CVE-2023-0401

NULL Pointer Dereference

Published: Feb 08, 2023 | Modified: Feb 04, 2024
CVSS 3.x
7.5
HIGH
Source:
NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.x
RedHat/V2
RedHat/V3
7.5 MODERATE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Ubuntu
MEDIUM

A NULL pointer can be dereferenced when signatures are being verified on PKCS7 signed or signedAndEnveloped data. In case the hash algorithm used for the signature is known to the OpenSSL library but the implementation of the hash algorithm is not available the digest initialization will fail. There is a missing check for the return value from the initialization function which later leads to invalid usage of the digest API most likely leading to a crash.

The unavailability of an algorithm can be caused by using FIPS enabled configuration of providers or more commonly by not loading the legacy provider.

PKCS7 data is processed by the SMIME library calls and also by the time stamp (TS) library calls. The TLS implementation in OpenSSL does not call these functions however third party applications would be affected if they call these functions to verify signatures on untrusted data.

Weakness

A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit.

Affected Software

Name Vendor Start Version End Version
Openssl Openssl 3.0.0 (including) 3.0.7 (including)
Edk2 Ubuntu trusty *
Edk2 Ubuntu xenial *
Nodejs Ubuntu jammy *
Nodejs Ubuntu trusty *
Openssl Ubuntu devel *
Openssl Ubuntu jammy *
Openssl Ubuntu kinetic *
Openssl Ubuntu lunar *
Openssl Ubuntu mantic *
Openssl Ubuntu trusty *
Openssl Ubuntu upstream *
Openssl Ubuntu xenial *
Red Hat Enterprise Linux 9 RedHat openssl-1:3.0.1-47.el9_1 *
Red Hat Enterprise Linux 9 RedHat openssl-1:3.0.1-47.el9_1 *
Red Hat Enterprise Linux 9.0 Extended Update Support RedHat openssl-1:3.0.1-46.el9_0 *

Potential Mitigations

References