CVE-2023-6237Excessive time spent checking invalid RSA public keys

Beschreibung

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.

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

Referenzen und Patches

• OpenSSL Advisory vendor-advisoryVendor Advisory
• 3.0.13 git commit patchPatch
• 3.1.5 git commit patchPatch
• 3.2.1 git commit patchPatch
• http://www.openwall.com/lists/oss-security/2024/03/11/1 Mailing ListThird Party Advisory
• https://security.netapp.com/advisory/ntap-20240531-0007/ Third Party Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-265688.html Third Party Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-331112.html Third Party Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-769027.html Third Party Advisory
• https://cert-portal.siemens.com/productcert/html/ssa-915275.html Third Party Advisory