CVE-2023-2975 — Issue summary: The AES-SIV cipher implementation contains a bug that causes it t

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.

01What is this vulnerability?

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.

02Affected products

Vendor	Product	Versions
OpenSSL	OpenSSL	3.1.0, 3.0.0

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2023-07-14T11:16:25.151Z
• Last modified: 2025-04-23T16:20:14.504Z

09References

• www.openssl.org — https://www.openssl.org/news/secadv/20230714.txt
• git.openssl.org — https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=6a83f0c958811f07e0d…
• git.openssl.org — https://git.openssl.org/gitweb/?p=openssl.git;a=commitdiff;h=00e2f5eea29994d1929…