Issue summary: Checking excessively long invalid RSA public keys may take a long time. Impact summary: Applications that use the function EVP_PKEY_public_check() to check RSA public keys may experience long delays. Where the key that is being checked has been obtained from an untrusted source this may lead to a Denial of Service. When function EVP_PKEY_public_check() is called on RSA public keys, a computation is done to confirm that the RSA modulus, n, is composite. For valid RSA keys, n is a product of two or more large primes and this computation completes quickly. However, if n is an overly large prime, then this computation would take a long time. An application that calls EVP_PKEY_public_check() and supplies an RSA key obtained from an untrusted source could be vulnerable to a Denial of Service attack. The function EVP_PKEY_public_check() is not called from other OpenSSL functions however it is called from the OpenSSL pkey command line application. For that reason that application is also vulnerable if used with the '-pubin' and '-check' options on untrusted data. The OpenSSL SSL/TLS implementation is not affected by this issue. The OpenSSL 3.0 and 3.1 FIPS providers are affected by this issue.
History

Fri, 22 Nov 2024 12:00:00 +0000


Mon, 14 Oct 2024 15:45:00 +0000


Mon, 14 Oct 2024 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 14 Oct 2024 15:00:00 +0000

Type Values Removed Values Added
Weaknesses CWE-606

cve-icon MITRE

Status: PUBLISHED

Assigner: openssl

Published: 2024-04-25T06:27:26.990Z

Updated: 2024-11-01T14:28:51.338Z

Reserved: 2023-11-21T10:16:34.346Z

Link: CVE-2023-6237

cve-icon Vulnrichment

Updated: 2024-08-02T08:21:18.096Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2024-04-25T07:15:45.270

Modified: 2024-11-21T08:43:25.997

Link: CVE-2023-6237

cve-icon Redhat

Severity : Low

Publid Date: 2024-01-15T00:00:00Z

Links: CVE-2023-6237 - Bugzilla