This function can be called on public keys supplied from untrusted sources which could allow an attacker to cause a denial of service attack.
This will most likely lead to an application crash. 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.Īn invalid pointer dereference on read can be triggered when an application tries to check a malformed DSA public key by the EVP_PKEY_public_check() function. PKCS7 data is processed by the SMIME library calls and also by the time stamp (TS) library calls. The unavailability of an algorithm can be caused by using FIPS enabled configuration of providers or more commonly by not loading the legacy provider. 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. 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.
IBM X-Force ID: 244356.Ī NULL pointer can be dereferenced when signatures are being verified on PKCS7 signed or signedAndEnveloped data. IBM QRadar SIEM 7.4 and 7.5copies certificate key files used for SSL/TLS in the QRadar web user interface to managed hosts in the deployment that do not require that key.
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