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AES OCB fails to encrypt some bytes

High severity GitHub Reviewed Published Jul 6, 2022 to the GitHub Advisory Database • Updated Jun 24, 2024

Package

cargo openssl-src (Rust)

Affected versions

>= 300.0.0, < 300.0.9
< 111.22.0

Patched versions

300.0.9
111.22.0

Description

AES OCB mode for 32-bit x86 platforms using the AES-NI assembly optimized implementation will not encrypt the entirety of the data under some circumstances. This could reveal sixteen bytes of data that was pre-existing 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.

References

Published by the National Vulnerability Database Jul 5, 2022
Published to the GitHub Advisory Database Jul 6, 2022
Reviewed Jul 6, 2022
Last updated Jun 24, 2024

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.847%
(83rd percentile)

Weaknesses

CVE ID

CVE-2022-2097

GHSA ID

GHSA-3wx7-46ch-7rq2

Source code

Credits

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