OpenSSL up to 3.0.5 Custom Cipher EVP_CIPHER_meth_new missing encryption

Summaryinfo

A vulnerability categorized as problematic has been discovered in OpenSSL up to 3.0.5. Affected by this issue is the function EVP_CIPHER_meth_new of the component Custom Cipher Handler. Executing a manipulation can lead to missing encryption. This vulnerability is tracked as CVE-2022-3358. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in OpenSSL up to 3.0.5 (Network Encryption Software) and classified as problematic. This vulnerability affects the function EVP_CIPHER_meth_new of the component Custom Cipher Handler. The manipulation with an unknown input leads to a missing encryption vulnerability. The CWE definition for the vulnerability is CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. As an impact it is known to affect confidentiality. CVE summarizes:

OpenSSL supports creating a custom cipher via the legacy EVP_CIPHER_meth_new() function and associated function calls. This function was deprecated in OpenSSL 3.0 and application authors are instead encouraged to use the new provider mechanism in order to implement custom ciphers. OpenSSL versions 3.0.0 to 3.0.5 incorrectly handle legacy custom ciphers passed to the EVP_EncryptInit_ex2(), EVP_DecryptInit_ex2() and EVP_CipherInit_ex2() functions (as well as other similarly named encryption and decryption initialisation functions). Instead of using the custom cipher directly it incorrectly tries to fetch an equivalent cipher from the available providers. An equivalent cipher is found based on the NID passed to EVP_CIPHER_meth_new(). This NID is supposed to represent the unique NID for a given cipher. However it is possible for an application to incorrectly pass NID_undef as this value in the call to EVP_CIPHER_meth_new(). When NID_undef is used in this way the OpenSSL encryption/decryption initialisation function will match the NULL cipher as being equivalent and will fetch this from the available providers. This will succeed if the default provider has been loaded (or if a third party provider has been loaded that offers this cipher). Using the NULL cipher means that the plaintext is emitted as the ciphertext. Applications are only affected by this issue if they call EVP_CIPHER_meth_new() using NID_undef and subsequently use it in a call to an encryption/decryption initialisation function. Applications that only use SSL/TLS are not impacted by this issue. Fixed in OpenSSL 3.0.6 (Affected 3.0.0-3.0.5).

The weakness was disclosed 10/11/2022. The advisory is available at git.openssl.org. This vulnerability was named CVE-2022-3358 since 09/29/2022. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1600 by the MITRE ATT&CK project.

The vulnerability scanner Nessus provides a plugin with the ID 211827 (Oracle Linux 9 : edk2 (ELSA-2024-12842)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.0.6 eliminates this vulnerability. Applying the patch 5485c56679d7c49b96e8fc8ca708b0b7e7c03c4b is able to eliminate this problem. The bugfix is ready for download at git.openssl.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (211827). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Type

• Network Encryption Software

Name

• OpenSSL

Version

• 3.0.0
• 3.0.1
• 3.0.2
• 3.0.3
• 3.0.4
• 3.0.5

License

• open-source

Website

• Product: https://www.openssl.org/

CPE 2.3info

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If you want to get best quality of vulnerability data, you may have to visit VulDB.

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