#Iphone backup extractor 4.0.9 how to#
#Iphone backup extractor 4.0.9 verification#
#Iphone backup extractor 4.0.9 code#

A NULL pointer dereference and a crash may occur leading to a possible denial of service attack. This function behaves incorrectly when both GENERAL_NAMEs contain an EDIPARTYNAME. OpenSSL provides a function GENERAL_NAME_cmp which compares different instances of a GENERAL_NAME to see if they are equal or not. One of those name types is known as EDIPartyName. The X.509 GeneralName type is a generic type for representing different types of names. It was addressed in the releases of 1.1.1n and 3.0.2 on the 15th March 2022. This issue affects OpenSSL versions 1.0.2, 1.1.1 and 3.0.

#Iphone backup extractor 4.0.9 verification#

In particular the attacker can use a self-signed certificate to trigger the loop during verification of the certificate signature. However any operation which requires the public key from the certificate will trigger the infinite loop. In the OpenSSL 1.0.2 version the public key is not parsed during initial parsing of the certificate which makes it slightly harder to trigger the infinite loop. Thus vulnerable situations include: - TLS clients consuming server certificates - TLS servers consuming client certificates - Hosting providers taking certificates or private keys from customers - Certificate authorities parsing certification requests from subscribers - Anything else which parses ASN.1 elliptic curve parameters Also any other applications that use the BN_mod_sqrt() where the attacker can control the parameter values are vulnerable to this DoS issue. The infinite loop can also be reached when parsing crafted private keys as they can contain explicit elliptic curve parameters. Since certificate parsing happens prior to verification of the certificate signature, any process that parses an externally supplied certificate may thus be subject to a denial of service attack. It is possible to trigger the infinite loop by crafting a certificate that has invalid explicit curve parameters. Internally this function is used when parsing certificates that contain elliptic curve public keys in compressed form or explicit elliptic curve parameters with a base point encoded in compressed form. The BN_mod_sqrt() function, which computes a modular square root, contains a bug that can cause it to loop forever for non-prime moduli. The location of the buffer is application dependent but is typically heap allocated. A malicious attacker who is able present SM2 content for decryption to an application could cause attacker chosen data to overflow the buffer by up to a maximum of 62 bytes altering the contents of other data held after the buffer, possibly changing application behaviour or causing the application to crash. This can lead to a buffer overflow when EVP_PKEY_decrypt() is called by the application a second time with a buffer that is too small.

#Iphone backup extractor 4.0.9 code#

A bug in the implementation of the SM2 decryption code means that the calculation of the buffer size required to hold the plaintext returned by the first call to EVP_PKEY_decrypt() can be smaller than the actual size required by the second call.

The application can then allocate a sufficiently sized buffer and call EVP_PKEY_decrypt() again, but this time passing a non-NULL value for the 'out' parameter. The first time, on entry, the 'out' parameter can be NULL and, on exit, the 'outlen' parameter is populated with the buffer size required to hold the decrypted plaintext. Typically an application will call this function twice. In order to decrypt SM2 encrypted data an application is expected to call the API function EVP_PKEY_decrypt().

#Iphone backup extractor 4.0.9 how to#

See How to fix? for Ubuntu:18.04 relevant versions. Note: Versions mentioned in the description apply to the upstream openssl package.