OpenSSL up to 3.0.7 DSA Public Key EVP_PKEY_public_check null pointer dereference

Summaryinfo

A vulnerability identified as problematic has been detected in OpenSSL up to 3.0.7. This vulnerability affects the function EVP_PKEY_public_check of the component DSA Public Key Handler. The manipulation leads to null pointer dereference. This vulnerability is referenced as CVE-2023-0217. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in OpenSSL up to 3.0.7 (Network Encryption Software). It has been rated as problematic. This issue affects the function EVP_PKEY_public_check of the component DSA Public Key Handler. The manipulation with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. Impacted is availability. The summary by CVE is:

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.

The weakness was published 02/07/2023. It is possible to read the advisory at openssl.org. The identification of this vulnerability is CVE-2023-0217. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 211573 (Oracle Linux 9 : openssl / and / openssl-fips-provider (ELSA-2024-9333)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.0.8 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (211573). Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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
• 3.0.6
• 3.0.7

License

• open-source

Website

• Product: https://www.openssl.org/

CPE 2.3info

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CPE 2.2info

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Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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