DescriptionAES OCB mode for 32-bit x86 platforms using the AES-NI assembly optimised implementation will not encrypt the entirety of the data under some circumstances. This could reveal sixteen bytes of data that was preexisting in the memory that wasn't written. In the special case of "in place" encryption, sixteen bytes of the plaintext would be revealed. Since OpenSSL does not support OCB based cipher suites for TLS and DTLS, they are both unaffected. Fixed in OpenSSL 3.0.5 (Affected 3.0.0-3.0.4). Fixed in OpenSSL 1.1.1q (Affected 1.1.1-1.1.1p).
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, bugtraq, EDB, Metasploit, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, Mageia, GitHub advisories/code/issues, web search, more)
Debian Bugs1023424

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
openssl (PTS)buster, buster (security)1.1.1n-0+deb10u3vulnerable
bullseye (security), bullseye1.1.1n-0+deb11u3vulnerable
bookworm, sid3.0.7-1fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs


[bullseye] - openssl <postponed> (Minor issue, fix along in next round of security updates)
[buster] - openssl <postponed> (Minor issue, fix along in next round of security updates);a=commit;h=a98f339ddd7e8f487d6e0088d4a9a42324885a93 (openssl-3.0.5);a=commit;h=919925673d6c9cfed3c1085497f5dfbbed5fc431 (OpenSSL_1_1_1q)

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