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Improper Authentication The advisory has been revoked - it doesn't affect any version of package openssl-ibmca  (opens in a new tab)

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EPSS
0.62% (50th percentile)

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  • Snyk IDSNYK-CENTOS9-OPENSSLIBMCA-5783951
  • published19 Jul 2023
  • disclosed7 Jul 2023
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Introduced: 7 Jul 2023

CVE-2023-2975  (opens in a new tab)
CWE-287  (opens in a new tab)

Amendment

The Centos security team deemed this advisory irrelevant for Centos:9.

NVD Description

Note: Versions mentioned in the description apply only to the upstream openssl-ibmca package and not the openssl-ibmca package as distributed by Centos.

Issue summary: The AES-SIV cipher implementation contains a bug that causes it to ignore empty associated data entries which are unauthenticated as a consequence.

Impact summary: Applications that use the AES-SIV algorithm and want to authenticate empty data entries as associated data can be misled by removing, adding or reordering such empty entries as these are ignored by the OpenSSL implementation. We are currently unaware of any such applications.

The AES-SIV algorithm allows for authentication of multiple associated data entries along with the encryption. To authenticate empty data the application has to call EVP_EncryptUpdate() (or EVP_CipherUpdate()) with NULL pointer as the output buffer and 0 as the input buffer length. The AES-SIV implementation in OpenSSL just returns success for such a call instead of performing the associated data authentication operation. The empty data thus will not be authenticated.

As this issue does not affect non-empty associated data authentication and we expect it to be rare for an application to use empty associated data entries this is qualified as Low severity issue.