CVE-2023-6237 Affecting edk2-aarch64 package, versions <0:20240524-6.0.1.el9_5


Severity

Recommended
medium

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-ORACLE9-EDK2AARCH64-8384983
  • published20 Nov 2024
  • disclosed25 Apr 2024

Introduced: 25 Apr 2024

CVE-2023-6237  (opens in a new tab)

How to fix?

Upgrade Oracle:9 edk2-aarch64 to version 0:20240524-6.0.1.el9_5 or higher.
This issue was patched in ELSA-2024-9088.

NVD Description

Note: Versions mentioned in the description apply only to the upstream edk2-aarch64 package and not the edk2-aarch64 package as distributed by Oracle. See How to fix? for Oracle:9 relevant fixed versions and status.

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.

CVSS Scores

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