NULL Pointer Dereference Affecting openssl package, versions <3.0.8-r0
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Test your applications- Snyk ID SNYK-ALPINE320-OPENSSL-7010788
- published 23 May 2024
- disclosed 8 Feb 2023
Introduced: 8 Feb 2023
CVE-2023-0401 Open this link in a new tabHow to fix?
Upgrade Alpine:3.20 openssl to version 3.0.8-r0 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream openssl package and not the openssl package as distributed by Alpine.
See How to fix? for Alpine:3.20 relevant fixed versions and status.
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.