cryptlib RSA Key Exchange Ciphersuite Marvin Attack cryptographic issue

Summaryinfo

A vulnerability classified as problematic was found in cryptlib. Impacted is an unknown function of the component RSA Key Exchange Ciphersuite. The manipulation results in cryptographic issue. This vulnerability is identified as CVE-2024-0202. There is not any exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in cryptlib (version unknown). Affected is an unknown function of the component RSA Key Exchange Ciphersuite. The manipulation with an unknown input leads to a cryptographic issue vulnerability. CWE is classifying the issue as CWE-310. This is going to have an impact on confidentiality. CVE summarizes:

A security vulnerability has been identified in the cryptlib cryptographic library when cryptlib is compiled with the support for RSA key exchange ciphersuites in TLS (by setting the USE_RSA_SUITES define), it will be vulnerable to the timing variant of the Bleichenbacher attack. An attacker that is able to perform a large number of connections to the server will be able to decrypt RSA ciphertexts or forge signatures using server's certificate. THIS CVE ID IS CURRENTLY DISPUTED - MAINTAINER NOTE: There are only two situations where it's enabled, one is for fuzz-testing to exercise code paths that wouldn't otherwise be available, the other is for static source code analysis with tools like Coverity and Prefast, again to open up code paths that otherwise wouldn't be available. It can also be enabled manually in two specific test builds just to make sure the code still compiles OK, to avoid bit rot and verify that the fuzz-testing build will compile without errors.

The weakness was released 01/03/2024. The advisory is available at bugzilla.redhat.com. This vulnerability is traded as CVE-2024-0202 since 01/02/2024. The technical details are unknown and an exploit is not available. This vulnerability is assigned to T1600 by the MITRE ATT&CK project.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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• cryptlib

CPE 2.3info

• 🔍

CPE 2.2info

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