Plaintext inference via predictable chained AES-CBC IVs
Published Mar 28, 2023 · Updated Feb 19, 2025
Predictable IV generation in FD.io VPP 19.04 through 22.10 allows remote attackers to infer AES-CBC IPsec plaintext from network traffic. The native and Intel IPsec Multi-Buffer backends satisfy VNET_CRYPTO_OP_FLAG_INIT_IV by chaining IVs, exposing a sequence predictable before encryption. Exploitation requires an AES-CBC security association and a chosen-plaintext position that permits ciphertext comparison; impact is limited to disclosure of encrypted data.
Summary
What happened
Predictable IV generation in FD.io VPP 19.04 through 22.10 allows remote attackers to infer AES-CBC IPsec plaintext from network traffic. The native and Intel IPsec Multi-Buffer backends satisfy VNET_CRYPTO_OP_FLAG_INIT_IV by chaining IVs, exposing a sequence predictable before encryption. Exploitation requires an AES-CBC security association and a chosen-plaintext position that permits ciphertext comparison; impact is limited to disclosure of encrypted data.
The record
- CVE
- CVE-2022-46397
- Published
- Mar 28, 2023
- Updated
- Feb 19, 2025
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-329, T1040
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Mar 28, 2023CVE publishedPublication date reported by the CVE source.
- Feb 19, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
What conditions does exploitation require?
What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo