CVE Details

Release Date:2023-07-07


Issue summary: The AES-SIV cipher implementation contains a bug that causes\nit to ignore empty associated data entries which are unauthenticated as\na consequence.\nImpact summary: Applications that use the AES-SIV algorithm and want to\nauthenticate empty data entries as associated data can be mislead by removing\nadding or reordering such empty entries as these are ignored by the OpenSSL\nimplementation. We are currently unaware of any such applications.\nThe AES-SIV algorithm allows for authentication of multiple associated\ndata entries along with the encryption. To authenticate empty data the\napplication has to call EVP_EncryptUpdate() (or EVP_CipherUpdate()) with\nNULL pointer as the output buffer and 0 as the input buffer length.\nThe AES-SIV implementation in OpenSSL just returns success for such a call\ninstead of performing the associated data authentication operation.\nThe empty data thus will not be authenticated.\nAs this issue does not affect non-empty associated data authentication and\nwe expect it to be rare for an application to use empty associated data\nentries this is qualified as Low severity issue.

See more information about CVE-2023-2975 from MITRE CVE dictionary and NIST NVD

CVSS v3.0 metrics

NOTE: The following CVSS v3.0 metrics and score provided are preliminary and subject to review.

Base Score: 5.3 Base Metrics: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Access Vector: Network Attack Complexity: Low
Privileges Required: None User Interaction: None
Scope: Unchanged Confidentiality Impact: None
Integrity Impact: Low Availability Impact: None

Errata information

PlatformErrataRelease Date
Oracle Linux version 9 (openssl)ELSA-2024-24472024-05-03
Oracle Linux version 9 (openssl-fips-provider)ELSA-2024-24472024-05-03

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