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CVE-2023-2975 is a low-severity flaw in the OpenSSL AES-SIV cipher implementation. In affected releases, an attempt to add an empty associated-data entry through EVP_EncryptUpdate() or EVP_CipherUpdate()—using a NULL output buffer and zero input length—returns success without incorporating that entry into AES-SIV authentication. Consequently, empty associated-data entries are omitted from the authenticated data vector, whereas non-empty associated data is processed correctly. Affected versions are OpenSSL 3.0.0 through 3.0.9 and 3.1.0 through 3.1.1. OpenSSL 1.0.2 and 1.1.1 are unaffected; the FIPS provider is also unaffected because it does not implement AES-SIV.
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An OpenSSL AES-SIV vulnerability related to improper handling of empty associated data entries.
Unknown
A vulnerability addressed by the updated Red Hat Developer Hub container image; no technical details are provided in this advisory text.
A Linux kernel CVE addressed by the advisory; no further description is provided.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.