CVE-2023-0217

A flaw was found in OpenSSL. An 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, most likely leading to an application crash. This function can be called on public keys supplied from untrusted sources, which could allow an attacker to cause a denial of service.

An 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. This will most likely lead to an application crash. This function can be called on public keys supplied from untrusted sources which could allow an attacker to cause a denial of service attack. The TLS implementation in OpenSSL does not call this function but applications might call the function if there are additional security requirements imposed by standards such as FIPS 140-3.

An update that solves 8 vulnerabilities and has two fixes is now available. This update for openssl-3 fixes the following issues. Fixed X.400 address type confusion in X.509 GENERAL_NAME_cmp for x400Address. Fixed NULL pointer dereference during PKCS7 data verification. Fixed NULL pointer dereference validating DSA public key. Fixed invalid pointer dereference in d2i_PKCS7 functions. Fixed use-after-free following BIO_new_NDEF. Fixed double free after calling PEM_read_bio_ex. Fixed timing Oracle in RSA Decryption. Fixed read Buffer Overflow with X.509 Name Constraints.