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.
Metrics
Affected Vendors & Products
References
History
Fri, 22 Nov 2024 12:00:00 +0000
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Metrics |
ssvc
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Mon, 14 Oct 2024 15:00:00 +0000
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Weaknesses | CWE-606 |
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Status: PUBLISHED
Assigner: openssl
Published:
Updated: 2024-11-01T14:28:51.338Z
Reserved: 2023-11-21T10:16:34.346Z
Link: CVE-2023-6237
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Updated: 2024-08-02T08:21:18.096Z
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Status : Awaiting Analysis
Published: 2024-04-25T07:15:45.270
Modified: 2024-11-21T08:43:25.997
Link: CVE-2023-6237
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