high
7.5
CWE
476
Advisory Published
CVE Published
CVE Published
Advisory Published
Updated

CVE-2023-0401: NULL dereference during PKCS7 data verification

First published: Wed Jan 25 2023(Updated: )

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.

Credit: openssl-security@openssl.org openssl-security@openssl.org openssl-security@openssl.org

Affected SoftwareAffected VersionHow to fix
redhat/openssl<1:3.0.1-47.el9_1
1:3.0.1-47.el9_1
redhat/openssl<1:3.0.1-46.el9_0
1:3.0.1-46.el9_0
OpenSSL OpenSSL>=3.0.0<=3.0.7
Stormshield Stormshield Management Center<3.3.3
rust/openssl-src>=300.0.0<300.0.12
300.0.12
debian/openssl
1.1.1w-0+deb11u1
1.1.1n-0+deb11u5
3.0.14-1~deb12u1
3.0.14-1~deb12u2
3.3.2-1

Remedy

https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=d3b6dfd70db844c4499bec6ad6601623a565e674

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the vulnerability ID?

    The vulnerability ID is CVE-2023-0401.

  • What is the title of the vulnerability?

    The title of the vulnerability is 'A NULL pointer vulnerability in OpenSSL'.

  • What is the severity of CVE-2023-0401?

    The severity of CVE-2023-0401 is high with a severity value of 7.

  • Which software is affected by CVE-2023-0401?

    The software affected by CVE-2023-0401 includes OpenSSL version 1:3.0.1-47.el9_1 and 1:3.0.1-46.el9_0, as well as Stormshield Management Center up to version 3.3.3.

  • How can this vulnerability be exploited?

    This vulnerability can be exploited through dereferencing a NULL pointer during the verification of signatures on PKCS7 signed or signedAndEnveloped data.

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